If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

There are a hundred statements.

First person says: At least one of the statements is false.

Second person says: At least two of the statements is false.

Third person says: At least three of the statements are false.

Fourth person says: At least four of the statements are false.

..

..

..

Hundredth person says: At least a hundred of the statements are false.

Analysing it, how many statements do you think are false and how many are true?

Why Wine Glass Stem is so long?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

What has many teeth, but cannot bite?

I am quite hot but become too cold if you remove the first two letters. What am I?

What's the only room from which no one can enter or leave

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