How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?
Can you spot what's wrong with the following sentence? PETER WAS ANGRY AT HIMSELF BECAUSE HE ACCIDENTALLY LEFT THE THE KEYS TO HIS CAR AT HIS FRIEND'S HOUSE.
Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?
"That Restaurant always remains crowded. This is the reason why nobody goes there". Can you find a flaw in this statement?
81 x 9 = 801. What must you do to make the this equation true?
A bomb exploded in a room full of married couples and no one died. How?
Make a sentence consisting of three words that have the whole alphabet.
Analyze and find the missing item in the sequence: 16, 06, 68, 88, __, 98
I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.
Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal? Note: 9 cannot be turned over to make it 6.
Replace the question mark in the picture below.
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.