What happened when the wheel was invented?

If,

1 = 5 ,
2 = 25 ,
3 = 325 ,
4 = 4325

Then, 5 = ?

Can you find out the missing number in the grid?

It belongs to you, but other people use it more than you do. What is it?

How many times in a given day, minutes and hour clock comes in a straight line ?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

What word is represented by this rebus?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

What has 88 keys?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?