Sum of the two numbers is 21 and their difference is what is the half of the greater number ?

Sum of the two numbers is 21 and their difference is what is the half of the greater number ?

A 7

B 6

C 9

D 12

Solution

Correct Answer: Option A

Let greater number is x

smaller number is y

x+y=21.........(1)

x-y=7............(2)

from 1 and 2

we got,x=14

half of the greater number is 14/2=7