How did you get on? Part B caused some anguish this time I think, and even part A was a bit tricky. Just take a look at Challenge 5 if you want to get serious!
Here are the winners of the prizes for Challenge 4A. Well done to all of you (and to those who haven't won anything yet I say an even louder congrats for your staying power - keep trying)
| Carlton Leonard from harrow way Ryan Green from Wrenn school Vit Huang, Rose Norris, James Burton, Bradley Conder, Aaron Kirkbride, Holly Marshall, Peter Owen, Jamie Pitts, Shaun Trussell, Robert Wight and Arron Reed from Fearnhill Amber Clark and Charlotte Clift from Woodlands School, Basildon Jena Glover-Dickson and Bethany Ashley from Harlington Upper School Edward, Jon, Adam and Rachel from Amery Hill Daniel Bilton from Farnborough School Georgia, Charly, Serena, Libby, Stevie and Rachel from Newport Girls' High School
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