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

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

You see me once in June, twice in November, and not at all in May. What am I?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

What makes this number unique: 8,549,176,320?

I don't get anymore wetter, no matter how much rain falls on me.

It is always ahead of me yet I can never see it. What is it?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?