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.

What is so fragile that saying its name breaks it?

Which is faster, Heat or Cold ? Explain.

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

Can you count the number of quadrilaterals in the picture below?

What has many teeth, but cannot bite?

What does this mean?

CCCCCCC

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?