Lessons

General Aptitude
27.1 Problems on Numbers - General Questions

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Q.

The sum of two number is 25 and their difference is 13. Find their product.

View Answer

Correct choice: B

Explanation:

Let the numbers be x and y.

Then, x + y = 25 and x - y = 13.

4xy = (x + y)2 - (x- y)2

   = (25)2 - (13)2

   = (625 - 169)

   = 456

xy = 114.

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