Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

I have Rs.50 and I spend it in the way as below.

In the picture given below, can you find out which digit will take place of the question mark?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

What is wrong in the below Picture?

People put me on the table and cut me but do not eat me. What am I?

Which is heavier: a ton of bricks or a ton of feathers?