SSC CHSL Model Paper 8

Question : 62 of 100

Marks: +1, -0

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

Solution:

Let the numbers be x and y.
Then, x + y = 25 and x – y = 13

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

⇒

4xy = 25^2 -13^2

= 625- 169 = 456

⇒ xy = 114

Go to Question:

Prev Question

Next Question