Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

Solve the equation in the image by looking at the pattern closely.

The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

Give it food and it will live; give it water and it will die.

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

Solve the puzzle by telling what does below picture means.

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?