In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

Can you spot the man between the coffee bean in the picture below ?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

What does this Rebus Picture mean?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Solve the counting riddle by identifying the number of triangles in the given picture.

What has one eye, but can’t see?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?