John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

How can a man go eight days without sleep?

Can you name some countries which do not have the alphabet 'A' in them?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.

Find the value of "?" in the ball picture Riddle below:

What can go through glass without breaking it?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?