SOLUTION: if i subtract 17 from the number i am thinking of and then multiply the difference by 25 i get 900 what is my number

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Question 1094687: if i subtract 17 from the number i am thinking of and then multiply the difference by 25 i get 900 what is my number
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
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If I subtract 17 from the number I am thinking of, and then multiply the difference by 25, I get 900. What is my number?
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n, number you want

25%28n-17%29=900-------solve this for n.

Answer by ikleyn(52835) About Me  (Show Source):
You can put this solution on YOUR website!
.
The best way to solve such puzzles (and solve them MENTALLY) is to go from the end to the beginning and to do the inverse operations:


a) divide 900 by 25 mentally to get 4*9 = 36;


b) add 17 to 36 to get 17+36 = 53.


It is your answer and your secret number.