Label the Box

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?




Similar Riddles

81 x 9 = 801. What must you do to make the this equation true?

Asked by Neha on 03 Oct 2021


A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

Asked by Neha on 12 Jun 2025

Find the hidden panda in the image below.

Find The Panda

Asked by Neha on 13 Jun 2024


Spot the cat in the picture below

Spot the Cat

Asked by Neha on 11 Apr 2021

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

Asked by Neha on 06 Jan 2021

Find the Goldfish below the given Image.

Find the Goldfish

Asked by Neha on 25 Feb 2025


I always drive my customer away.

Who am I?

Asked by Neha on 29 Oct 2024

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

Asked by Neha on 15 Aug 2025

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

Akbar Birbal line on the floor riddle

Asked by Neha on 07 May 2021


There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Asked by Neha on 08 Apr 2022

Hot Articles

Amazing Facts

Gamers

In 2011, people playing Foldit, an online puzzle game about protein folding, resolved the structure of an enzyme that causes an Aids-like disease in monkeys. Researchers had been working on the problem for 13 years. The gamers solved it in three weeks.