Why do people go to bed?

In the image given, you can find several triangles. Can you count them all?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

What happened when the wheel was invented?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

What kind of tree can you carry in your hand?

Find the missing letter in the last circle logically in the given below picture.

Can you find a rabbit in the given picture?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?