A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

How can you tell a raw egg from a hard-boiled egg?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

What can go up a chimney down, but can’t go down a chimney up?

What is always in front of you but can’t be seen?

What does below pictogram mean?

Can you solve this picture maths equation?

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?