Question:
The sum of two number is 25 and their difference is 13. Find their product.
[A].104
114
315
325
The sum of two number is 25 and their difference is 13. Find their product.
[A].
[B].
[C].
[D].
Answer: Option 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.