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Number Detective

Follow the clues to find the mystery number.

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After some matches were played, most of the information in the table containing the results of the games was accidentally deleted. What was the score in each match played?

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Eight Dominoes

Using the 8 dominoes make a square where each of the columns and rows adds up to 8

Old Order

Stage: 2 and 3 Short Challenge Level: Challenge Level:1

The first sentence tells us that Gus is not the youngest. The second sentence tells us that neither Alessandro nor Flora is the youngest. From the third sentence, Oliver is not the youngest, whilst the sixth sentence tells us that Yvette is not the youngest. So Zara must be the youngest and the order of their ages is Gus, Yvette, Flora, Alessandro, Oliver, Zara.

This problem is taken from the UKMT Mathematical Challenges.