Problems based on Numbers Test 3

Question : 27 of 40

Marks: +1, -0

If the difference between two numbers and their squares is 8 and 80 respectively, then find the sum of the numbers?

Solution:

Let the two numbers be x and y
Now

x - y = 8

and

x^2-y^2=80

(x+y)(x-y)=80

(x+y)(8)=80

x+y=10

So, the sum of numbers is 10.

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