You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

During which month do people sleep the least?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

Spot 5 differences in two Christmas tree below:

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

What is common among 11, 69, and 88?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

Can you divide the below-given shape into four equal and identical pieces?