During which month do people sleep the least?

What has one letter and starts with an E?

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

How many times can you subtract the number 5 from 25?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

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

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

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

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

How many times can you subtract the number two from the number fifty?