In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

What has many keys but can’t open a single lock?

A man dies of old age on his 25 birthday. How is this possible?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

Take one out and scratch my head, I am now black but once was red. What am I?

What do you get if you add 2 to 100 four times?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

By using 'because' continuously three times, can you make an English statement ?

What jumps when it walks and sits when it stands?