Our product and our sum always give the same answer. Who are we?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Count the number of balls in picture below:

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

The dirtier I get, the whiter I look. Who am I?

Can you guess the name of the month by looking the below rebus ?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

No matter how little or how much you use me, you change me every month. What am I?

I shave every day, but my beard stays the same. What am I?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.