Black Changes its Colour

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




Similar Riddles

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

Asked by Neha on 05 Apr 2024


Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

Asked by Neha on 02 May 2023

What do you see in the given picture?

Are you Intelligent ?

Asked by Neha on 17 May 2021


A man is lying dead in a field where no one is around. His head is split open and his legs are disfigured. Near to him, there is an unopened package. No living organism can be found anywhere at the crime scene.

How did he die?

Asked by Neha on 04 Apr 2023

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Asked by Neha on 29 Mar 2024

Replace the question mark with the correct number in the below-given picture?

Number Riddle

Asked by Neha on 08 Sep 2023


Can you count the number of squares in the given picture?

How Many Squares you Find

Asked by Neha on 13 Feb 2024

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

Asked by Neha on 19 Apr 2022

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

Asked by Neha on 11 Feb 2026


This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

Asked by Neha on 17 Oct 2024

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Amazing Facts

Rubik’s Cube

The inventor of the Rubik’s Cube didn’t realize he’d built a puzzle until he scrambled it the first time and tried to restore it.