Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What is next number in the pattern below:

131 517 192 123 ?

Which number should replace the question mark?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

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?