I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

What goes up but never comes down?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

How do you go from 98 to 720 using just one letter?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?