John was piloting a plane behind a car but was never able to overtake it. Why?

What's the only room from which no one can enter or leave

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Birbal was jester, counsellor, and fool to the great Moghul emperor, Akbar.
The villagers loved to talk of Birbal's wisdom and cleverness,
and the emperor loved to try to outsmart him.
One day Akbar (emperor) drew a line across the floor.
"Birbal," he ordered, "you must make this line shorter, but you cannot erase any bit of it."
Everyone present thought the emperor had finally outsmarted Birbal.
It was clearly an impossible task.
Yet within moments the emperor and everyone else present had to agree that Birbal had made the line shorter without erasing any of it.
How could this be?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half. How many hens does the farmer need to produce one dozen eggs in six days?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?