Can you make four (4) nines (9) equal 100?

Who can jump higher than a Mountain?

What can you hold in your right hand, but never in your left hand?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

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

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

A solo dice game is played. In this game, upon each turn, a normal pair of dice is rolled and the score is calculated not by adding the numbers but multiplying them.

In a particular game, the score for the second roll is five more than what was achieved in the first roll. The score for the third roll is six less than what was completed in the second roll. The score for the fourth roll is eleven more than what was achieved in the third. The score for the fifth roll is eight less than what was completed in the fourth.

Can you calculate the score for each of the five throws?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?