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Question

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


Options:
A .  104
B .  114
C .  315
D .  325
Answer: Option B

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

 The Sum Of Two Number Is 25 And Their Difference Is 13. Fin... xy = 114.



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