Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Take one out and scratch my head, I am now black but once was red. What am I?

What is the word or phrase?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

What's a single-digit number with no value?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”