Can you find out the missing number in the grid?

I’m tall when I’m young, and I’m short when I’m old. What am I?

When does a USA Potato change its nationality?

Spot the cat in the picture below

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

What does the rebus below mean?

TEN BADTION

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Can you fill the blank with the correct number?

6 30 870 756030 _____