Solve this riddle by finding the odd one out from the rest.

Why do we preferably have round manhole covers and not square ones?

When we see 2 but call 10?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

You need to move three matchsticks to form three squares. Can you do it?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?