What brings you down but never up?

Replace the question mark with the correct number in below Picture:

Find the missing letter in the last circle logically in the given below picture.

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)