In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

A man escapes from jail using help from his girlfriend. The investigators suspect four girls of being the man's girlfriend.

Out of those four girls, one is his girlfriend who is lying. Two of the girls are completely innocent and are speaking the truth. One of the girls is the man's sister who is helping the girlfriend lie. Following are the statements from all four of them:

Ariana: "Myrna is his girlfriend."
Jane: "Angelina is lying."
Angelina: "Ariana is lying."
Myrna: "Jane is not his sister."

Can you find out who is the man's sister among them?

What goes up but never comes down?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

Replace the question mark with the number below given a simple math problem.

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

O_er_t_o_

Complete the missing letters of the given word.

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?