Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

Can you move 2 matchsticks to form four equal sized squares.

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

What question can you never answer yes to?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?