The centre of the third figure is empty. What digit should fit inside?
By using 'because' continuously three times, can you make an English statement ?
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?
Who can jump higher than a Mountain?
The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?
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?
How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?
What have one eye but still cannot see?
You can see it everyday, But cannot touch it at will. What is it?
Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?
You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?
In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki
