What brings you down but never up?

Why is the Hole below a Lock?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

If six children and two dogs were under an umbrella, how come none of them got wet?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

What has no start, end, or centre?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Solve the puzzle by telling what does below picture means.

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=