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midhurst | 16:35 Thu 04th May 2006 | Quizzes & Puzzles
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Which tree living today also occurs in fossils of 250 million years ago?


which is the odd one out 5 7 9 17 23 37?

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Odd one out i'd say is 9, as the others are all prime numbers.
What about the Maidenhair Tree (Ginkgo biloba)?
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Thanks guinnessman and crofter I am sure you are right

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