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The sum of two number is 25 and their difference is...

This question belongs to Arithmetic Ability Problems On Numbers
Problems on Numbers
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The sum of two number is 25 and their difference is 13. Find their product.

Answer & Solution
Correct 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
∴ xy = 114
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2 Comments
Manjunath Chikklagar
Manjunath Chikklagar 6 years ago
Which formula you used in this sir
Ramakrishna H
Ramakrishna H 7 years ago
sum of two numbers is 25 and their product -150 what are the numbers
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