Replace the 'X' with any mathematical symbol to make the expression equal to 111. 18 X 12 X 2 X 3 = 111
Can you find out the next digit in the following series ? 0, 0, 1, 3, 2, 6, 3, 9, 4, 12, 5, ?
Solve the mathematical equation in the picture below.
What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?
A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?
Count the squares in the matchstick puzzle below?
I have no life, but I can die. What am I?
How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?
You need to arrange three 7 and mathematical symbols to form number 1?
What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?
You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
