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Questions 3 and 4 seem incorrect. The answer I get for question 3 as written has 8 digits, but the accepted answer has only 6. Similarly for question 4.
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@HJ: the smallest one does have 6, and Q4 is correct too. I bought the cards and had good fun solving it myself. I’m glad to find this here though to check my answers as when I did the shading it looked like the picture wasn’t quite right. Thanks for the cards Matthew, I look forward to next year’s - no pressure!
Alec
on /blog/92
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