What brings you down but never up?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

What runs around the whole yard without moving?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

81 x 9 = 801. What must you do to make the this equation true?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?