Find out the missing number in the picture attached:

What demands an answer, but asks no questions

A man dies of old age on his 25 birthday. How is this possible?

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 ?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

Using Only Five 5's and any mathematical operator make sum as 37