You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

The dirtier I get, the whiter I look. Who am I?

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

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

Can you count the number of matches in the picture below ?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you find out the remainder when 3^300 is divided by 5?

At the local model boat club, four friends were talking about their boats.

There were a total of eight boats, two in each colour, red, green, blue and yellow. Each friend owned two boats. No friend had two boats of the same colour.

Alan didn't have a yellow boat. Brian didn't have a red boat but did have a green one. One of the friends had a yellow boat and a blue boat and another friend had a green boat and a blue boat. Charles had a yellow boat. Darren had a blue boat, but didn't have a green one.

Can you work out which friend had which coloured boats?

What has a bottom at the top?