Which alphabet is a part of our body?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

Solve the counting riddle by identifying the number of triangles in the given picture.

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

Explain?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Find the next number in the series below

21 32 54 87 131 ?

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

Which famous Hollywood movie name is hidden in the below rebus?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?