I have two sand hourglasses:
1. A 7 minute one and
2. An 11-minute one.

Using just these 2 sand hourglasses, how can I measure time as 15 minutes?

The Puzzle: Here is a famous prize problem that Sam Loyd issued in 1882, offering $1000 as a prize for the best answer showing how to arrange the seven figures and the eight 'dots' .4.5.6.7.8.9.0. which would add up to 82

What two things can you never eat for breakfast?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

How far can you walk into the woods?

What word begins and ends with an E, but has only one letter?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

I am white when I am dirty, and black when I am clean. What am I?

What number divided by 4 is the same as that number minus 4?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1