Pets Arithmagons

We keep many animals as pets the most popular include dogs, cats, hamsters, fish, mice, guinea pigs and birds. Did you know that a goldfish can live up to 40 years and a bird must eat at least half its own weight in food each day to suvive?

See if you can solve these four difficult arithmagons.

The aim of an arithmagon is to work out which numbers go in the empty circles. The numbers in the square boxes are made by adding together the numbers in the circles either side.