Prove that the below maths equation is true. 8 + 8 = 91
Find the number of squares in the below picture
Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.
What does the following represent? N N N N N N N A A A A A A A C C C C C C C
A word I know has six letters it contains, remove one letter and 12 remain. What is it?
Name a key which is hardest to turn.
Decode this picture on T-Shirt and tell what it says ?
What is full of holes but still holds water?
What can you hold in your right hand, but never in your left hand?
What can you catch but never throw?
When 99 is considered higher than 100?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.