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Cong Lu sent us nets of the two shapes in this problem. Here is the first one:
Here is the second one:
Well done. You might have drawn the net a different way, which is absolutely fine, so please send in your net if that's the case.
It can be quite tricky to check whether two nets produce the same shape, can't it? The visualisation is challenging! It can be a good idea to check by making the shape from the net.
How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?