What you cannot hold but it is yours?

Find the next number in the series below.

6 18 270 72090 ?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

I am an odd number. Take away a letter and I become even. What number am I?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

Can you find out the missing number in the grid?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

10+10 and 11+11 can give you the same answer.

Explain how?

Which tank will fill first?