Strategy - 1: 1. Whose Age Get out Do Him Tell me That Any A Numbers Take , by 2. 2 This Numbers Multiply To do Say , add 3.5 To do Say , 4. by 50 Multiply To do Say , 5. Now , if This Year (2012) already His Birthday Exceed By Remains , but added 1762 To do Say , r If This Years Already His Birthday Exceed No. By Remains , but added 1761 To do Tell me . ( Target Keep it , every Years This Number 1 increases Will get . That is , in 2013 , 1763 and 1762 , respectively , and in 2014 , 1764 and 1763 , respectively . To do Will be ) 6. Finally 4 numbers That Year He Born Has done That Subtraction To do Tell me . The result Knowingly Take : that The number Got it , her The first Being the number ( s ) His Original Numbers And The end Two The numbers Hall His Age ! Strategy - 2: 1. Whose Age Get out Do Him Tell me His Of age The first By the number 5 Multiply To do , ( if Age <10, e.g .: 5, consider it as 05. If Age > 100, e.g. , 102, then take 10 as the first digit, 2 as the second one.) 2. Results With 3 plus To do Say , 3. Received The result By K2 _ Multiply To do Say , 4. Now 3 Of the person Age Of The second The numbers Addition To do Say , and You The result Knowingly Take : 5. Final The result From You subtract 6 Do that _ Got it T - e His Age ! Pretty cool, huh. Strategy - 3: 1. Whose Age Get out Do Him Say by 7 His To age Gun To do , 2. then Multiplication Again by 1443 Multiply To do Tell me , now Multiplication T. You Listen Take . What? Got it ? His Age 3 times Repetition . Example See : 28 ( age ) x 7 = 196. 196 x 1443 = 282828! Strategy - 4: It Strategy - from 3 A little Different . Still Funny . 1. Whose Age Get out Do Him Tell me Calculator By His By age 3367 Multiply To do , 2. Now Multiply the product by 3 Multiply To do Tell me , now The result T. You Listen Take . What? Got it ? His Age 3 times Repetition .