I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

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

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

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

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

During which month do people sleep the least?

What number divided by 4 is the same as that number minus 4?