DRDO Multi tasking staff Model paper 6

Let the unit of ratio be x
∴ The numbers are x, 5x and 9x
Smallest number = x
Largest number = 9x
Second number = 5x
According to question,
x + 9x = 5x + 100
⇒ 5x = 100
⇒ x = 20
∴ Smallest number = 20