What is the difference in the ages of P and K? I. P is 20 yr older than M. II. M is 2 yr younger than Z.
A bus crosses a traffic signal post in 10 seconds. What is the length of the bus?
I. The bus crosses a platform of 75 metres in 20 seconds.
II. The bus is running at the speed of 60 kmph.
If m and n are both positive integers, then how less is n than m?
I. m + n =20
II. m = n2
The sum of ages of M, N and 0 is 50 yr. What is N's age? I. N is 10 yr older than M. II. 0 is 30 yr old.