STEP1: ASK YOUR FD THE RESULT OF HIS AGE, IF MULTIPLIED BY 20 AND THEN PLUS 2.
STEP 2: MULTIPLE THE ANSWER OF STEP 1 BY 5 AND THEN HIS AGE, TELL YOU THE NO.
STEP 3 SUBTRACT IT BY 10; HIS AGE IS THE VALUE OF TENTH AND UNIT DIGIT.
1, how the trick works?
2, can you suggest 2 similar ways to find your fd's age?
the way to find the age in trick!
2007-12-08 10:35 pm
回答 (1)
2007-12-09 3:03 am
✔ 最佳答案
let x be his age.after step1:the result is x * 20 + 2 = 20x + 2
after step2:the result is x * 100 + 10
after step3:the result is x * 100
so you just need to divide the result by 100 , you can get his age.
兩個差唔多既方法:將個歲數+1,再*100,然後-100,除50,再x10,除20.
另一個係將佢既歲數x67,然後自己再將佢*3,個位同十位就係個歲數啦
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