Can you replace the question mark with the correct number in the below table sequence?

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

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

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

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

What four weights can be used to balance from 1 to 30 pounds?

You bought me for dinner but never eat me. What am I?

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

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

How can you make number one disappear by adding something to it?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process