On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

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?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?