Akram thought of a number, added 7, multiplied by 3, took away 5 and divided by 4 to give an answer of 7. What was the starting number?

A) 2

B) 3

C) 4

D) 5

Let Number is X

Added 7 in number = X+7

Multiply 3 to number = ( X+7) * 3

Took away 5 from no. = ( X+7) *3 -5

Dividing 4 to number =[ ( X+7) *3 -5]/4

Given condition :

[ ( X+7) *3 -5]/4 =7

by solving this 

                       X=4

so number is 4.

 

 

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