What Adam and Eve do not have but the rest of the people have?
Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.
I have lakes with no water, mountains with no stone and cities with no buildings. What am I?
I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?
How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?
Can you count the number of seconds in a year? Clue: You need to bother about calculation.
Do You See It?
How many triangles can you find in this given picture?
Can you make a six-letter word using the letters N, A and B ?
Can you think of any three-dimensional shape that comprises of exactly two surfaces?
Which word does the below Plexor means ?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.