Why Aeroplane windows are round?

Different lights make me strange by changing me into different sizes. What am I?

How is the moon similar to a dollar?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

Which alphabet is a part of our body?

Which letter of the alphabet has the most water?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

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?

Why did Navjot Singh Sidhu put the new January calendar in the freezer