Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

It belongs to you, but other people use it more than you do. What is it?

Can you make a fire with just a single stick?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

Which number comes next in the number series?

2, 9, 30, 93, ?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)