What word is pronounced the same if you take away four of its five letters?

How many times can you subtract the number 5 from 25?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

What building has the most stories?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

A father's child, a mother's child, yet no one's son.

Who am I?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?