self Numerical Ability Algebra

Q. Find (7x + 4y ) / (x-2y) if x/2y = 3/2?
Ans = 7 But how ?

Option
(a) 6
(b) 8
(c) 7
(d) data insufficient

Read Solution (Total 2)

self Other Question

Two trains starting at the same time from two stations 200 km apart, and going in opposite directions cross each other at a distance of 110 km from one of the stations. What is the ratio of their speeds? Q. Find unit digit of 1123!*2313!*2568!, If possible find no of zeroes after the multiplication?