Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Rebus Puzzle Definition: A rebus is an illusion device that uses pictures to represent words or parts of words.
What does This Rebus Puzzle Identify?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

I add 5 to 9 and get 2. The answer is correct, so what am I?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

Prove that twice of ten is the same as twice of eleven.