i can normally do these with no problem, but I have for some reason got the same number twice in one square which has thrown me. I have the two lower yellow niumbers as 4 and 5 is the top left number 5?
Thankyou oldswoman..I had 545 and I knew that was wrong.
Thanks Mrs overall for that useful link. I actually enjoy working out the puzzles, but once in a while you do get stuck, so that will be a handy back up.