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

How can you tell a raw egg from a hard-boiled egg?

When is the top of a mountain similar to a savings account?

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?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you place six X (crosses) in below board without making three in a row in any way ?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.