I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Can you find the dog hidden in a group of pandas?

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 was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

What is always in front of you but can’t be seen?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

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

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?