Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

When it's bad luck to meet a black cat?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

How many letters are in the alphabet?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

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

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?