Worked answer, part one Worked answer, part two

Answer: FIFTEEN is 4043551
The winner is Darren Anderson from New South Wales, Australia. There were 103 entries.
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See the two diagrams, right, for the worked answer.
20 January 2010
Worked answer, part one Worked answer, part two

Answer: FIFTEEN is 4043551
The winner is Darren Anderson from New South Wales, Australia. There were 103 entries.
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See the two diagrams, right, for the worked answer.
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