Surjit is 6 years older than Julie. In four years, the product of their ages will be 160. How old are Surjit and Julia currently?

Answer 1

S=J+6

(S+4)(J+4)=160

(J+6+4)(J+4) = 160

(J+10)(J+4) =160

J^2 +14J +40 =160

J^2 +14J +49 = 120+49

(J+7)^2 =169

J+7 = 13

J=13-7=6 yrs old

S=J+6=12 yrs old