Directions : What will come in the place of the question mark (?) in the following number series?

100 100   50  150  37.5 ?

A clock is set right at 8 a.m. on Sunday. It gains 8 minutes in 24 hours. What is the correct time when the clock indicates 9 p.m. on upcoming Sunday? 

A certain sum is deposited for 4 years at a rate of 10% per annum on compound interest compounded annually. The difference between ihe interest at the end of 2 years and that at the end of 4 years is ₹5,082. Find the sum (in ₹).

The average weight of P and his three friends is 55 kg. If P is 4 kg more than the average weight of his three friends, what is P's weight (in kg)?