If 21x = 79x, what is the value of x?

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?

Find the next number in the series below.

6 18 270 72090 ?

What is red and smells like blue paint?

Why Aeroplane windows are round?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

The centre of the third figure is empty. What digit should fit inside?

People make me, save me, change me, raise me. What am I?