The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

Prove that the below maths equation is true.

8 + 8 = 91

What kind of band never plays music?

I look at you, you look at me I raise my right, you raise your left. What am I?

A man dies of old age on his 25 birthday. How is this possible?

You need to cut a round cake into eight equal pieces with just 3 cuts. Can you do it?

What do you answer even though it never asks you questions?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Why is 6 afraid of 7?