What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?
How many sides does a circle have?
The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM
PS: You may start the number from 0.
There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.
What has 13 hearts but no other organs?
Which fur should we be getting from the Lion?
If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?
I have an eye but still cannot see.
Who am I?
I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?
The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.
Boxes are labeled but all labels are wrong!
You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.
How many such operations are necessary to correctly label the boxes?
Artificial Intelligence has crushed all human records in the puzzle game “2048,” achieving a high score of 839,732 and beating the game in only 973 moves without using any undo.
