A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

What is black when you buy it, red when you use it, and gray when you throw it away?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

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

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

What two things can you never eat for breakfast?

I’m tall when I’m young, and I’m short when I’m old. What am I?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Can you find the hidden animal in the picture below?