You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What country can make you shiver?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

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