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

Sharpest vision can find the lamp in the desert. Are you one of them? Test your observation skills now!

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

Why are all black people so quick ?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Can you solve the maths in the below-given picture equation?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

What is the word or phrase?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.