You need to arrange three 7 and mathematical symbols to form number 1?
Give it food and it will live; give it water and it will die.
Using eight eights and addition only, can you make 1000?
There is a place where if I stand up straight, I will still be considered sideways.
A number can be multiplied by multiple of nine i.e 9 18 27 36 45 ... and the resulting number consist of only one digit. Can you identify the number ?
A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?
Can you find out what is missing? 1 3 5 2 4 ? Hint: It's not six. Think out of the box.
What four weights can be used to balance from 1 to 30 pounds?
What does this say? XLR8
Forwards I am heavy, backward I am not. What am I?
Can you count the number of triangles in the given figure?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
