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

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

I travel all around the world but always stay in the corner. What am I?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Ten coins have been arranged as you can see in the given picture. In this arrangement, a triangle is formed pointing upwards. You have to invert the position of the triangle and make it point downwards while changing the position of 3 coins only. Can you do it?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98