A father's child, a mother's child, yet no one's son.

Who am I?

Before Mount Everest was discovered, what was the highest mountain in the world?

What is the next number in this matchsticks series riddle?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

In a guessing game, five friends had to guess the exact numbers of apples in a covered basket.
Friends guessed 22, 24, 29, 33, and 38, but none of the guesses was correct. The guesses were off by 1, 8, 6, 3, and 8 (in random order).

Can you determine the number of apples in a basket from this information?

In the picture given below, can you find out which digit will take place of the question mark?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

I look at you, you look at me I raise my right, you raise your left. What am I?

What does this rebus mean?

O
N
C
E
TIME

Who can jump higher than a Mountain?