A boy was asked to multiply a number by 25. He instead multiplied the number by 52 and got the answer 324 more than the correct answer. The number to be multiplied was:

A    12

B    15

C    25

D    32 

Solution

Correct Answer: Option A

 

 let number is= x.  now 52x = 25x + 324  or, x= 12

 

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