How many full adders are required to add four-digit numbers?

How many full adders are required to add four-digit  numbers?
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Answer :

Four.
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The BCD adder to add two decimal digits needs minimum of (A) 6 full adders and 2 half adders (B) 5 full adders and 3 half adders (C) 4 full adders and 3 half adders (D) 5 full adders and 2 half adders

Description : The BCD adder to add two decimal digits needs minimum of (A) 6 full adders and 2 half adders (B) 5 full adders and 3 half adders (C) 4 full adders and 3 half adders (D) 5 full adders and 2 half adders

Last Answer : (D) 5 full adders and 2 half adders

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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.

All the four-digit numbers except one is written using a single font. Identify the number that does not use the same font as the other numbers.

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Last Answer : 2440

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Description : If somebody choose two digit and three digit numbers and their difference is 989.What will be their sum? a) 1000 b)1010 c) 1006?

Last Answer : None of the above. Let x be the three digit number and y be the two digit number. x - y =989. x = 989 + y. x is obviously greater than 989 and less than 1000 (since it is three digits). Since y is a two digit number ... 989 + 10 = 999. We can't go any higher, so x =999 and y=10. x+y = 999+10 = 1009

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Last Answer : This one is fairly easy if you use elimination if you follow all the first 5 steps you get three options: 525, 327, and 723 but if you followed the last step you would reach your answer. The answer was 327.

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Last Answer : 25 = 5² and 36 = 6².

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Description : How many two digit prime numbers end in the digit 3?

Last Answer : 13, 23, 43, 53, 73 & 83

How many two digit numbers are there in which the tens digit is greater then the ones digit?

Description : How many two digit numbers are there in which the tens digit is greater then the ones digit?

Last Answer : Well, if the tens digit is 1, you have 1 option for the onesdigit; if the tens digit is 2, you have two options for the onesdigit, if the tens digit is 3, you have 3 options for the onesdigit, etc.; up to: if the ... is 9, you have 9 options forthe ones digit. Add all that up (1 + 2 + 3 + ... + 9).

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How many 3-digit numbers are there in which the product of those 3 digits is 9?

Description : How many 3-digit numbers are there in which the product of those 3 digits is 9?

Last Answer : 119, 191, 911, 331, 313, 133

How many different 4 digit combinations are there for numbers 1 2 3 (assuming all three numbers are used and no numbers can be repeated more than once) (For example, 1233 is acceptable, but 1133 is not.)?

Description : How many different 4 digit combinations are there for numbers 1 2 3 (assuming all three numbers are used and no numbers can be repeated more than once) (For example, 1233 is acceptable, but 1133 is not.)?

Last Answer : NOT AN ANSWER:More acceptable combinations:1231 3213 2321More unacceptable combinations:1112 2222 3113Thanks.

How many numbers between 50 and 150 have at least one digit that is 2?

Description : How many numbers between 50 and 150 have at least one digit that is 2?

Last Answer : i need it for homework too

How many positive multiples of nine are two-digit numbers?

Description : How many positive multiples of nine are two-digit numbers?

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A two digit number exceeds forty percent of another two digit number by 16. If the sum of these two digit numbers is 72, which of the following is the difference between these two digit numbers ? a) 10 b) 6 c) 8 d) 14 e) None of these

Description : A two digit number exceeds forty percent of another two digit number by 16. If the sum of these two digit numbers is 72, which of the following is the difference between these two digit numbers ? a) 10 b) 6 c) 8 d) 14 e) None of these

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, B, C and D are four digits. Average of A and B are equal to average of C and D. Average of B and D is greater than average of A and B whereas average of A and D is less than average of A and B.Which digit has maximum value?

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What Largest four digit even number can be formed with 3987?

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What is the MSD and LSD of the following numbers (a) 420. (b) 1045.06 (c) 0.0024 (d) 247.0001

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Description : Why do the numbers on a roulette wheel add up to 666?

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Three equal numbers that when add them up is Sixty but not twenty. What are the numbers? -Riddles

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Last Answer : 55+5=60

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.

What are three ways you can add 4 odd numbers and get ten? -Riddles

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Last Answer : 1+1+3+5=10 1+1+1+7=10 1+3+3+3=10

Q: Can two odd numbers add up to give an odd number? -General Knowledge

Description : Q: Can two odd numbers add up to give an odd number? -General Knowledge

Last Answer : No. Two odd numbers will always sum up to give an even number.