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

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

I look at you, you look at me, I raise my right, you raise your left. What am I?

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

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

Can you spot the hidden girl in the picture below?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

Different lights make me strange by changing me into different sizes. What am I?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?