William from Tattingstone School said that he tried four times before he came up with a solution to Cycling Squares:

15-10-6-313-12-4-5-11-14-2-34-30-19-17-8-28-21

We're glad you didn't give up, William. Matha, also from Tattingstone, said that she started with the number 2 and then added 14 because it was the only number she could have added to make a square number. She goes on to say:

I then added 11 to 14 to get 25 which is another square number and carried on like this.

Martha sent in a drawing of her circle which is the same as William's answer, just written in a different way:

circle of numbers going clockwise: 14, 11, 5, 4, 17, 13, 3, 6, 10, 15, 21, 28, 8, 17, 19, 30, 34, 2

Thank you also to Tilly Ashcroft from Maldon Court Prep School who sent in her correct solution. Tilly pointed out that the 7 should have been a 17 in the question. Both Martha and William must have spotted this mistake too. We're very sorry about that and have now corrected the problem itself.