What is the next number in this matchsticks series riddle?

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?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

I shave every day, but my beard stays the same. What am I?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Why do we preferably have round manhole covers and not square ones?

What is the coolest letter in the alphabet?