What does this below rebus puzzle mean?

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

which number am I?

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.

When we see 2 but call 10?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Which is the rope you never skip with?