Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

What Does this text mean:

important=important

What is so fragile that saying its name breaks it?

Can you solve the photo plexer logic ?

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?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

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?

Why is the longest human nose just 11 inches?

What is the next number in this matchsticks series riddle?