An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

What is harder to catch the faster you run?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

A tourist visits a small town for his research. While in the town, he decides to get a haircut. Since the town is quite small, there are only two barbers in the town � one on the North Street and one on the South Street. The barbershop on the North Street is a mess and the barber has a weird and pathetic haircut. While the barbershop at the South Street is pretty tidy and the barber as well has an impressive haircut.

Which barbershop will the tourist visit for his haircut and why?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Solve the following series:
AZ, GT, MN, __, YB

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

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