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?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Can you fill the blank with the correct number?

6 30 870 756030 _____

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Count the number of balls in picture below:

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?