As easy as you can get into me, it is as hard to get out of me. Do you know what I am?
Can you think of any three-dimensional shape that comprises of exactly two surfaces?
How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?
Forwards I am heavy, backward I am not. What am I?
What are the next two letters in the following series and why? W A T N T L I T F S _ _ *Hint: Check Puzzle Title
Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?
Check out the number list below and find what number comes next in the sequence. 111 , 113 , 117 , 119 , 123 , 137 , ?
I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?
Solve the riddle below: If a Chicken says, 'All chickens are liars" is the chicken telling the truth?
Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true. * * x * ===== * * *
I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.