Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

What does a man do only once in his lifetime, but women do once a year after they are 29?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

What is the longest word in the dictionary?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Assume the given figure to be a delicious doughnut. Yes, now you can concentrate more on the puzzle. So you have this delicious doughnut in your refrigerator when your friends come knocking at the door. There are eight of them. Now you have to make three cuts in this doughnut so that each one of you nine people can enjoy a piece of it. Neither you nor your friends would mind the size of their piece as long as they are getting it. How will you do it?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?