What breaks yet never falls, and what falls yet never breaks?
What is in seasons, seconds, centuries and minutes but not in decades, years or days?
What numbers should go on the bottom line? 3 6 9 15 8 2 10 12 11 8 19 27 19 10 29 39 ? ? ? ?
What number should come in place of the question mark below?
If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?
Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?
Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!
Complete the series by replacing "?" with the correct number. ST ND RD TH '?'
What type of curtain does this rebus mean
Count the squares in the matchstick puzzle below?
How many times can you subtract the number 5 from 25?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
