Why Aeroplane windows are round?

How many sides does a circle have?

Which alphabet is a part of our body?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Can you discover the missing number in this series?

37, 10, 82
29, 11, 47
96, 15, 87
42, ?, 15

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

Why did Buffon take the goal with him after every Juventus match?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

Decode below rebus
D
N
A
T
S , D

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?