Question

A boy said, “the product of my age 4 years before and after 4 years is 84,” then the present age of the
boy is :
a) 8 years (b) 10 years (c) 12 years (d) 15 years

Answer 1

Answer:

10 years

Step-by-step explanation:

let present age be X

then

(X-4)(X+4)=84

X^2- 4^2=84

X^2 = 84 + 16 =100

X = 10