Find the next number in the sequence 5 12 24 36 ?
Nine marbles are arranged in the image below. Can you slide two marbles to form a square?
You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?
This is a classy optical illusion puzzle. What more you can find except bricks in the image below?
How do you go from 98 to 720 using just one letter?
You have two buckets of 11 liters and 6 litres. How can you measure exactly 8 litres?
A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it. How can he do that?
What is at the end of a rainbow?
Find the next number in the series 12, 20, 40, 72, 116, 172 ?
Can you find the odd number in the following five choices? 1) 482636 2) 259807 3) 865195 4) 104739 5) 391744
You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?
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
