Two numbers are in the ratio ` 3 : 4` When 7 is added to each, the ratio becomes ` 4 : 5` Find the numbers.

Two numbers are in the ratio ` 3 : 4` When 7 is added to each, the ratio becomes ` 4 : 5` Find the numbers.
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Two numbers are in the ratio ` 3 : 4` When 7 is added to each, the ratio becomes ` 4 : 5` Find the numbers.
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What number must be added to each term of the ratio 7:5 so that it becomes 4:3?

Description : What number must be added to each term of the ratio 7:5 so that it becomes 4:3?

Last Answer : What number must be added to each term of the ratio 7:5 so that it becomes 4:3?

When 7 is added to the numerator and denominator of the fraction, then the new ratio of numerator and denominator becomes 13:19, what is the original ratio ? A) 11:13 B) 7:9 C) 4:7 D) Can’t be determined E) None of these

Description : When 7 is added to the numerator and denominator of the fraction, then the new ratio of numerator and denominator becomes 13:19, what is the original ratio ? A) 11:13 B) 7:9 C) 4:7 D) Can’t be determined E) None of these

Last Answer : Answer: D  X+7/y+7 = 13/19 x and y are different variable, so original fraction cannot be determined

Two numbers are in the ration 3:5. If 9 is subtracted from the numbers, the ratio becomes 12:23. The numbers are (A) 30, 50 (B) 36, 60 (C) 33, 55 (D) 42, 70

Description : Two numbers are in the ration 3:5. If 9 is subtracted from the numbers, the ratio becomes 12:23. The numbers are (A) 30, 50 (B) 36, 60 (C) 33, 55 (D) 42, 70

Last Answer : Answer: C

When the celebrated German mathematician Karl Friedrich Gauss (1777-1855) was nine he was asked to add all the integers from 1 through 100. He quickly added 1 to 100, 2 to 99, and so on for 50 pairs of numbers each adding to 101. 50 X 101=5,050.Now find the sum of all the digits in integers from 1 through 1,000,000,000.That's all the digits in all the numbers, not all the numbers themselves. -Riddles

Description : When the celebrated German mathematician Karl Friedrich Gauss (1777-1855) was nine he was asked to add all the integers from 1 through 100. He quickly added 1 to 100, 2 to 99, and so on for 50 pairs ... 1,000,000,000.That's all the digits in all the numbers, not all the numbers themselves. -Riddles

Last Answer : The numbers can be grouped by pairs: 999,999,999 and 0; 999,999,998 and 1' 999,999,997 and 2; and so on.... There are half a billion pairs, and the sum of the digits in each pair is 81. The digits in the unpaired number, 1,000,000,000, add to 1. Then: (500,000,000 X 81) + 1= 40,500,000,001.

One-fifth of a number is equal to 5/8th of another number. If 35 is added to the first number, it becomes four times of the second number. Find the second number. 1. 39 2. 70 3. 40 4. 25 5. None of these

Description : One-fifth of a number is equal to 5/8th of another number. If 35 is added to the first number, it becomes four times of the second number. Find the second number. 1. 39 2. 70 3. 40 4. 25 5. None of these

Last Answer : Answer- 3(40) Explanation:- (1/5)x =(5/8)y………..1 if 35 is added to first no. , x + 35= 4y so,x= 4y -35 put in eq 1… (1/5)( 4y-35) = (5/8)y y=40 =second number

A container contains a mixture of two liquids P and Q in the ratio 7 : 5. When 9 litres of mixture are drawn off and the container is filled with Q, the ratio of P and Q becomes 7 : 9. How many litres of liquid P was contained in the container initially? a) 12 b) 21 c) 93 d)17 e) None

Description : A container contains a mixture of two liquids P and Q in the ratio 7 : 5. When 9 litres of mixture are drawn off and the container is filled with Q, the ratio of P and Q becomes 7 : 9. How many litres of liquid P was contained in the container initially? a) 12 b) 21 c) 93 d)17 e) None 

Last Answer : B Let initial quantity of P in the container be 7x and initial quantity of Q in the container be 5x Now 9 litres of mixture is drawn off from the container. Quantity of P in 9 litres of the mixture drawn off ... = 7 : 9 x=16* 21/4*28 Litres of P contained in the container initially =7x = 21

Three year ago, ratio of Tom and Ram age’s was 5 : 6 respectively. After 12 years, this ratio becomes 6 : 7. How old is Ram at present? a) 39years b) 93 years c) 78 years d) 87 years

Description : Three year ago, ratio of Tom and Ram age’s was 5 : 6 respectively. After 12 years, this ratio becomes 6 : 7. How old is Ram at present? a) 39years b) 93 years c) 78 years d) 87 years

Last Answer : B We are given that age ratio of tom and ram = 5 : 6 Tom's age = 5x and Ram's age = 6x 3 years ago, their age was 5x and 6x. Hence at present, Tom's age = 5x +3 and Ram's age = 6x +3 After 12years, Tom's ... = 6 / 7 7 (5x + 15) = 6 (6x + 15) X = 15 Ram's present age = (6x + 3) = 93years 

A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further 18 g of water is added to this solution. The new vapour pressure becomes 2.9 kPa at 298 K. Calculate (i) the molecular mass of solute and (ii) vapour pressure of water at 298 K -Chemistry

Description : A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further 18 g of water is added to this solution. The new vapour pressure ... K. Calculate (i) the molecular mass of solute and (ii) vapour pressure of water at 298 K -Chemistry

Last Answer : For a very dilute solution ∴ Molecular mass, MB = 34 g/mol.

When Arsenic atoms are added Germanium lattice, it becomes a/an - (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Description : When Arsenic atoms are added Germanium lattice, it becomes a/an - (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Last Answer : (4) Extrinsic semiconductor Explanation: When a peritavalent (donor) impurity, like arsenic, is added to germanium, it will form covalent bonds with thegermanium atoms, leaving 1 electron relatively ... this manner - either with Nor P-type impurities - are referred to as EXTRINSIC semiconductors.

When a detergent is added to pure water, its surface tension – (1) increases (2) decreases (3) remains constant (4) becomes infinite

Description : When a detergent is added to pure water, its surface tension – (1) increases (2) decreases (3) remains constant (4) becomes infinite

Last Answer : (2) decreases Explanation: When Soaps and detergents are added to water, they weaken the strength of the skin on the water's surface due to surface tension by interfering with hydrogen bonding ... of the soap or detergent is also attracted to the water, thereby decreasing the surface tension.

Which of the following statements concerning the specific gravity of a battery electrolyte is true? A. The electrolyte becomes less dense when it is cooled. B. The specific gravity reading is lowered when the electrolyte is heated. C. The most accurate hydrometer reading is obtained immediately after water is added. D. The temperature does not affect the specific gravity of the electrolyte.

Description : Which of the following statements concerning the specific gravity of a battery electrolyte is true? A. The electrolyte becomes less dense when it is cooled. B. The specific gravity reading is lowered ... water is added. D. The temperature does not affect the specific gravity of the electrolyte.

Last Answer : Answer: B

The effective rate of protection (a). distinguishes between tariffs that are effective and those that are ineffective (b). is the minimum level at which a tariff becomes effective in limiting imports (c). shows how effective a tariff is in raising revenue for the government (d). shows the increase in value added for domestic production that a particular tariff structure makes possible, in percentage terms

Description : The effective rate of protection (a). distinguishes between tariffs that are effective and those that are ineffective (b). is the minimum level at which a tariff becomes effective in ... in value added for domestic production that a particular tariff structure makes possible, in percentage terms

Last Answer : d). shows the increase in value added for domestic production that a particular tariff structure makes possible, in percentage terms

When Arsenic atoms are added to Germanium lattice, it becomes a/an (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Description : When Arsenic atoms are added to Germanium lattice, it becomes a/an (1) Insulator (2) Superconductor (3) Intrinsic semiconductor (4) Extrinsic semiconductor

Last Answer : Extrinsic semiconductor

When a detergent is added to pure water, its surface tension (1) increases (2) decreases (3) remains constant (4) becomes infinite

Description : When a detergent is added to pure water, its surface tension (1) increases (2) decreases (3) remains constant (4) becomes infinite

Last Answer : decreases

In 1 kg mixture of sand and iron, 20% is iron. How much sand should be added so that the proportion of iron becomes 10%? a) 1 kg b) 200 gms c) 800 gms d) 1.8 kg e) None of these

Description : In 1 kg mixture of sand and iron, 20% is iron. How much sand should be added so that the proportion of iron becomes 10%? a) 1 kg b) 200 gms c) 800 gms d) 1.8 kg e) None of these

Last Answer : Answer: A If we add x grams of sand, the total amount would be 1,000 + x grams of mixture and we need 200 grams of iron to be 10% of that: 0.1(1,000 + x) = 200 --> x = 1,000. 

In 1 kg mixture of iron and carbon, 40% is carbon. How much iron should be added so that the proportion of carbon becomes 20% a)1.5kg b)2kg c)3kg d)5kg

Description :  In 1 kg mixture of iron and carbon, 40% is carbon. How much iron should be added so that the proportion of carbon becomes 20% a)1.5kg b)2kg c)3kg d)5kg e)1kg

Last Answer : E Quantity of the mixture : Quantity of iron = 20 : 20 = 1 : 1 Given that quantity of the mixture = 1 kg Hence quantity of iron to be added = 1 kg

When a pentavalent impurity is added to a pure semiconductor, it becomes ………

Last Answer : When a pentavalent impurity is added to a pure semiconductor, it becomes n-type semiconductor.

Two candles of same height are lighted at the same time. The first is consumed in 3 hours and second in 2 hours. Assuming that each candles burns at a constant rate, in how many hours after being lighted, the ratio between the first and second candles becomes 2:1? A) 2 hour B) 2.5 hour C) 4 hour D) 1.5 hour E) None of these

Description : Two candles of same height are lighted at the same time. The first is consumed in 3 hours and second in 2 hours. Assuming that each candles burns at a constant rate, in how many hours after being lighted, the ratio between the ... 2:1? A) 2 hour B) 2.5 hour C) 4 hour D) 1.5 hour E) None of these

Last Answer : Answer: D Height of both candles are same i.e. h First one takes 3 hours to burn completely, so in one hour = h/3 Similarly second one will burn in one hour = h/2 Let after t time, ratio between their height is 2:1 so, ... given 2:1, h - t*(h/3) / h - t*(h/2) = 2/1 Solving we get t = 1.5

The salary of two friends Ramu and Raju are in the ratio 4:5. If the salary of each one increases by Rs.6000, then the new ratio becomes 48:55. What is Raju's present salary? a) Rs.10500 b) Rs.10500 c) Rs.11500 d) Rs.12500

Description : The salary of two friends Ramu and Raju are in the ratio 4:5. If the salary of each one increases by Rs.6000, then the new ratio becomes 48:55. What is Raju's present salary? a) Rs.10500 b) Rs.10500 c) Rs.11500 d) Rs.12500

Last Answer : Answer : B Ratio their salary is 4:5 Let the original salary of Ramu and Raju be 4k and 5k respectively. After increasing Rs.6000, the ratio becomes 48:55 That is, (4k+6000)/(5k+6000) = 48/55 ... of Raju; that is, 5k. If 20k = 42000 then 5k = 10500. Hence the required answer is Rs.10500

The ratio of the number of students in schools X and Y is 4:7. if 15 students from Y join X, then the ratio becomes 1:1. What is the total number of s

Description : The ratio of the number of students in schools X and Y is 4:7. if 15 students from Y join X, then the ratio becomes 1:1. What is the total number of s

Last Answer : The ratio of the number of students in schools X and Y is 4:7. if 15 students from Y join X, ... the total number of students in the schools X and Y?

400 gm spirit solution has 30 % spirit in it , what is the ratio of spirit should be added to make it 80 % in the solution ? A)2:5 B)4:3 C)5:2 D)2:7

Description : 400 gm spirit solution has 30 % spirit in it , what is the ratio of spirit should be added to make it 80 % in the solution ? A)2:5 B)4:3 C)5:2 D)2:7

Last Answer : A)2:5

The ratio between two number is 3:4 ,if each number be increased by 9, the ratio becomes 18:23 find the sum of the number a) 135 b) 105 c) 155 d) 165 e) None of these

Description : The ratio between two number is 3:4 ,if each number be increased by 9, the ratio becomes 18:23 find the sum of the number a) 135 b) 105 c) 155 d) 165 e) None of these

Last Answer : Let the two numbers be 3x and 4x. When they are increased by 9 they become 3x + 9 and 4x + 9. It is given that the ratio is 18:23 Thus, 3x + 9/4x + 9 = 18:23 23(3x + 9) = 18(4x + 9) 69x + 207 = 72x ... = -45 X = 15 Thus two numbers are 3x15 = 45 and 4 x 15 = 60 And the sum is 60+45 = 105 Answer: b)

Two candles of same height are lighted at the same time. The first is consumed in 6 hours and second in 4 hours. Assuming that each candles burns at a constant rate, in how many hours after being lighted, the ratio between the first and second candles becomes 2:1? a) 1 hour b) 2 hour c) 3 hour d) 4 hour e) None of these

Description : Two candles of same height are lighted at the same time. The first is consumed in 6 hours and second in 4 hours. Assuming that each candles burns at a constant rate, in how many hours after being lighted, the ratio between ... becomes 2:1? a) 1 hour b) 2 hour c) 3 hour d) 4 hour e) None of these

Last Answer : Answer: C Let height of both candles is ‘h’ and let after t times ratio between the height be 2:1 h – t*h/6 : h – t*h/4 = 2:1 t = 3

The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is -Maths 9th

Description : The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is -Maths 9th

Last Answer : NEED ANSWER

The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is -Maths 9th

Description : The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is -Maths 9th

Last Answer : Excluded number is

0,1,2,3,4,5,6,7,8,9 Use the digits above once each only to compose two fractions which when added togeather equal 1. -Riddles

Description : 0,1,2,3,4,5,6,7,8,9 Use the digits above once each only to compose two fractions which when added togeather equal 1. -Riddles

Last Answer : 35/70 + 148/296 = 1

Two numbers are respectively 40% and 60% more than than the third number. The ratio of the two number is A) 6:7 B) 7:8 C) 8:7 D) 7:5 E) None of these

Description : Two numbers are respectively 40% and 60% more than than the third number. The ratio of the two number is A) 6:7 B) 7:8 C) 8:7 D) 7:5 E) None of these

Last Answer : Answer: B Let third number = x (140/100)x = (7/5)x (160/100)x = (8/5)x (7/5) : (8/5) = 35 : 40 = 7 : 8

I am a two-digit number. All my digits are even. No two digits are the same. None of my digits are prime numbers. I am not a multiple of ten. My tens digit is bigger than my other numbers. If you followed all the previous steps, there should be three options remaining the number is the option where if you add all the digits it’s exactly in the middle (in how big the number is) of all the other options with their digits added together. What number am I? -Riddles

Description : I am a two-digit number. All my digits are even. No two digits are the same. None of my digits are prime numbers. I am not a multiple of ten. My tens digit is bigger than my other numbers. ... big the number is) of all the other options with their digits added together. What number am I? -Riddles

Last Answer : If you followed all the steps apart from the last one there will be three options remaining: 64, 84, and 86. You then had to add up the digits, 64=6+4=10, 84=8+4=12, and 86=8+6=14. ... biggest number (12) and put it back as it was before the digits were added together and your answer should be 84.

What two whole, postive numbers have the same answer when multiplied together as when added together? -Riddles

Description : What two whole, postive numbers have the same answer when multiplied together as when added together? -Riddles

Last Answer : 2 and 2.

What two whole, positive numbers that have a one-digit answer when multiplied and a two-digit answer when added? -Riddles

Description : What two whole, positive numbers that have a one-digit answer when multiplied and a two-digit answer when added? -Riddles

Last Answer : 1 and 9.

There are two numbers whose product added to the sum of their squares is 109, and the difference of whose squares is 24. What are the two numbers? -Riddles

Description : There are two numbers whose product added to the sum of their squares is 109, and the difference of whose squares is 24. What are the two numbers? -Riddles

Last Answer : 5 and 7. (5)² = 25 (7)² = 49 (5x7)+25+49=109 49-25=24

What two numbers added together equal 15.2 and when multiplied equals 52?

Description : What two numbers added together equal 15.2 and when multiplied equals 52?

Last Answer : The numbers are 10 and 5.2

What two different prime numbers added together equals a square number?

Description : What two different prime numbers added together equals a square number?

Last Answer : They can be: 3+97 = 100 or 31+5 = 36

What two consecutive numbers when added together total 11227?

Description : What two consecutive numbers when added together total 11227?

Last Answer : 2

What three whole, positive numbers have the same answer when multiplied together as when added together? -Riddles

Description : What three whole, positive numbers have the same answer when multiplied together as when added together? -Riddles

Last Answer : 1, 2 and 3. 1 x 2 x 3 = 1 + 2 + 3 = 6

Find four numbers, the sum of which is 45, so that if 2 is added to the first number, 2 is subtracted from the second number, the third number is multiplied by 2 and the fourth number is divided by 2, then the four numbers so produced are all the same. What are the four numbers? -Riddles

Description : Find four numbers, the sum of which is 45, so that if 2 is added to the first number, 2 is subtracted from the second number, the third number is multiplied by 2 and the fourth number is divided by 2, then the four numbers so produced are all the same. What are the four numbers? -Riddles

Last Answer : 8 + 2 = 10 12 - 2 = 10 5 x 2 = 10 20 ÷ 2 = 10 45

What three numbers, none of which is zero, give the same result whether they’re added or multiplied? -Riddles

Description : What three numbers, none of which is zero, give the same result whether they’re added or multiplied? -Riddles

Last Answer : One, two and three give the same result whether they're added or multiplied.

What 2 numbers added together make 96?

Description : What 2 numbers added together make 96?

Last Answer : Feel Free to Answer

Which of the following statements defines density of population? (a) Number of persons living in per unit area. (b) Number of persons living in a country © Change in the number of inhabitants of a country during a specific period of time. (d) Absolute numbers added every year.

Description : Which of the following statements defines density of population? (a) Number of persons living in per unit area. (b) Number of persons living in a country © Change in the number of inhabitants of a country during a specific period of time. (d) Absolute numbers added every year.

Last Answer : (a) Number of persons living in per unit area.

As the reflux ratio decreases, the (A) Separation becomes more efficient (B) Number of plates increases (C) Column diameter increases (D) None of these

Description : As the reflux ratio decreases, the (A) Separation becomes more efficient (B) Number of plates increases (C) Column diameter increases (D) None of these

Last Answer : (B) Number of plates increases

When the psychometric ratio is __________ then the adiabatic saturation temperature and wet bulb temperature becomes equal. (A) 1 (B) < 1 (C) > 1 (D) ∞

Description : When the psychometric ratio is __________ then the adiabatic saturation temperature and wet bulb temperature becomes equal. (A) 1 (B) < 1 (C) > 1 (D) ∞

Last Answer : (A) 1

Pick up the correct statement from the following: (A) The phenomenon of quicksand generally occurs in the cohesionless soil (B) At critical hydraulic gradient, the saturated sand becomes quick (C) The critical gradient depends on the void ratio and the specific gravity (D) All the above

Description : Pick up the correct statement from the following: (A) The phenomenon of quicksand generally occurs in the cohesionless soil (B) At critical hydraulic gradient, the saturated sand becomes quick (C) The critical gradient depends on the void ratio and the specific gravity (D) All the above

Last Answer : (D) All the above

In a solution of 45 litres of milk and water, ` 40%` is water. How many litres of milk must be added to become the ratio of milk and water ` 5 : 3` ?

Description : In a solution of 45 litres of milk and water, ` 40%` is water. How many litres of milk must be added to become the ratio of milk and water ` 5 : 3` ?

Last Answer : In a solution of 45 litres of milk and water, ` 40%` is water. How many litres of milk must be added to become the ... : 3` ? A. 8 B. 3 C. 7 D. 6

When 30 percent of a number is added to another number the second number increases to its 140 per cent. What is the ratio between the first and the second number? a) 3 : 4 b) 4 : 3 c) 3 : 2 d) 4 : 5 e) None of these

Description : When 30 percent of a number is added to another number the second number increases to its 140 per cent. What is the ratio between the first and the second number? a) 3 : 4 b) 4 : 3 c) 3 : 2 d) 4 : 5 e) None of these

Last Answer : Answer: B of x=140% of y or, y + 0.3x = 1.4y or, 0.3x = 0.4y ∴ x : y = 0.4 : 0.3 = 4 : 3

In 20 litres of a mixture, the ratio of sugar syrub to honey syrub is 5:1. In order to make the ratio of sugar syrub to honey syrub as 3:1, the quantity of honey syrub that should be added to the mixture will be A) 5 2/3 B) 4 1/3 C) 6 2/3 D) 2 2/9

Description : In 20 litres of a mixture, the ratio of sugar syrub to honey syrub is 5:1. In order to make the ratio of sugar syrub to honey syrub as 3:1, the quantity of honey syrub that should be added to the mixture will be A) 5 2/3 B) 4 1/3 C) 6 2/3 D) 2 2/9

Last Answer : D By the rule of alligation Quantity of honey : Quantity of mixture =1/12:3/4}=1:9 Given that quantity of mixture = 20 litre =>Quantity of honey : 20 = 1 : 9 => Quantity of honey = 20 x1/9  = 2 2/9 litre

Calculate quantity of water to be added for casting cubes in laboratory by 12.5 kg cement if w/c ratio 0.45.

Description : Calculate quantity of water to be added for casting cubes in laboratory by 12.5 kg cement if w/c ratio 0.45. 

Last Answer : As w/c = (weight of water / weight of cement)  w/c = (Ww / Wc)  0.45 = (Ww / 12.5)  Ww = (0.45x12.5)  Ww = 5.625 kg or 5.625 Litres

In this series 6, 4, 1, 2, 2, 8, 7, 4, 2, 1, 5, 3, 8, 6, 2, 2, 7, 1, 4, 1, 3, 5, 8, 6, how many pairs of successive numbers have a difference of 2 each ? (A) 4 (B) 5 (C) 6 (D) 8

Description : In this series 6, 4, 1, 2, 2, 8, 7, 4, 2, 1, 5, 3, 8, 6, 2, 2, 7, 1, 4, 1, 3, 5, 8, 6, how many pairs of successive numbers have a difference of 2 each ? (A) 4 (B) 5 (C) 6 (D) 8

Last Answer : Answer: C

If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respectively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation (A) 0.1P + 0.3Y + 0.1Z = W/C × P (B) 0.3P + 0.1Y + 0.01Z = W/C × P (C) 0.4P + 0.2Y + 0.01Z = W/C × P (D) 0.5P + 0.3Y + 0.01Z = W/C × P

Description : If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respectively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation (A) 0.1P + 0.3Y + 0. ... + 0.2Y + 0.01Z = W/C P (D) 0.5P + 0.3Y + 0.01Z = W/C P

Last Answer : Answer: Option B

Pick up the incorrect statement from the following. For performing compressive strength test of cement (A) Cement and standard sand mortar are used in the ratio of 1 : 3 (B) Water is added at the rate of (P/4) + 3.0 percentage of water where P is the percentage of water for standard consistency (C) A cube mould of 10 cm × 10 cm × 10 cm is used (D) The prepared moulds are kept in a atmosphere of 50% relative humidity

Description : Pick up the incorrect statement from the following. For performing compressive strength test of cement (A) Cement and standard sand mortar are used in the ratio of 1 : 3 (B) Water is added at the ... cm 10 cm is used (D) The prepared moulds are kept in a atmosphere of 50% relative humidity

Last Answer : Answer: Option A