Find The Next Number In The Sequence 30 10 15 13 0 16 -15 ?
How can you leave a room with two legs and return with six legs?
When monkey rotate the gear, which mark will be hit 1 or 2 ?
How can you make number one disappear by adding something to it?
A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing. Which other pages won't be there?
How do you go from 98 to 720 using just one letter?
If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age. How old will John be two years from now?
How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?
As easy as you can get into me, it is as hard to get out of me. Do you know what I am?
You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?
Can you count the number of matches in the picture below ?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
