Question

find the number whose one-third part exceeds its one-fifth part by 20?

Answer 1

Let the no =x

1/3*x =x/3

1/5*x =x/5

x/3 = x/5 +20

x/3 - x/5 = 20

lcm of 5 and 3 = 15

5x - 3x /15 = 20

2x/15 = 20

x = 20*15/2

X = 150

1/3* 150 = 50

1/5* 150 = 30