When can we add 2 to 11 and get 1 as the correct answer?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

The husband and wife were jogging in the morning. To match every two steps of the husband, the wife required three steps. If Both of them start with the here right foot. After how many steps do their left foot be together?

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?