I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What is black when you buy it, red when you use it, and gray when you throw it away?

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?

We have arranged an array of numbers below. What you have to do is use any kind of mathematical symbol you know excluding any symbol that contains a number like cube root. You can use any amount of symbols but you have to come up with a valid equation for all of them.

0 0 0 = 6
1 1 1 = 6
2 + 2 + 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Can you count the number of squares in the given picture?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

How is the moon similar to a dollar?