Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

What can go up a chimney down, but can’t go down a chimney up?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

In which direction should the missing arrow point?

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

Look at the picture and find out which square is not linked with any of the other squares.

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

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