DRDO Multi tasking staff Model paper 10

Let the smallest number be x.
The middle number = x + 1
The largest number = x + 2
According to the question,
⇒ x + x + 1 + x + 2 = 123
⇒ 3x + 3 = 123
⇒ x = 40
∴ The largest number = 40 + 2 = 42