Question

Find a number whose one-third part exceeds its one-fifth part by 20.

Answer 1

Let the number = x

According to the condition

`1/3"x" - 1/5"x" = 20`

`=> ("5x - 3x")/15 = 20`  ...(LCM of 3, and 5 = 15)

`=> "2x"/15 = 20`

`=> "x" = (20 xx 15)/2`

`=> "x" = 150`

∴ Number = 150