Have fun with this riddle and think out of the box to answer this one.
Mark is walking and behind him are Alex and Jacob who are sprinting towards him.
No matter how fast these youngsters sprinted towards Mark, they could not catch up with him.
Do you know the reason why Mark was able to be one step ahead of Alex and Jacob?
If you get the answer you are awesome at thinking out of the box.
Share it with your friends on WhatsApp and find out who among them can think as well as you.
They are all in a gym running on a treadmill.