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

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

Spot what is wrong here in below Picture?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Can you count the number of triangles inside a triangle?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

Solve the equation in the image by looking at the pattern closely.

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.