1)

Two numbers are in the ratio 5 : 6 and if 4 is subtracted from each ,they are reduced to the ratio 4 : 5,find the smaller number


A) 20

B) 16

C) 12

D) 14

E) 17

Answer:

Option A

Explanation:

Let the two numbers be $5x$  and $6x$

Given  $\frac{5x-4}{6x-4}$ $=\frac{4}{5}$

$25x-20$ $=24x-16$

$x = 4$

Smaller number  $= 5x$ $=5\times4$ $= 20$