A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

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

which number am I?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Look at me. I can bring a smile to your face, A tear to your eye, Or even a thought to your mind. But, I can't be seen. What am I?

What 5-letter word typed in all capital letters can be read the same upside down?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

I have thought of a number that is made up by using all the ten digits just once. Here are a few clues for you to guess my number:

First digits is divisible by 1.
First two digits are divisible by 2.
First three digits are divisible by 3.
First four digits are divisible by 4.
First five digits are divisible by 5.
First six digits are divisible by 6.
First seven digits are divisible by 7.
First eight digits are divisible by 8.
First nine digits are divisible by 9.
The number is divisible by 10.

Can you find out the number ?

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

What is the next number?

77, 49, 36, 18 ?