What word begins and ends with an E, but has only one letter?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

Give it food and it will live; give it water and it will die.

Can you solve this picture maths equation?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

What month of the year has 28 days?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?