Count the number of triangles in the picture below:

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

What is black when you buy it, red when you use it, and gray when you throw it away?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

Katniss and Peeta are liars. They both lie on some specific days.

Katniss lies on Fridays, Saturdays and Sundays. She speaks the truth on all other days.

Peeta lies on Tuesdays, Wednesdays and Thursdays. He speaks the truth on all other days.

Can you tell that one day of the week when both of them will say "Tomorrow, I will lie."?

Can you find the hidden animal in the picture below?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?