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Kate's Date

When Kate ate a giant date, the average weight of the dates decreased. What was the weight of the date that Kate ate?

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Grandpa's Rock Cakes

Weekly Problem 34 - 2012
Grandpa made a super-heavy rock cake. Five people have guessed the weight of the cake. Can you work out the weight of his cake?

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Marathon Mission

Weekly Problem 33 - 2012
Minnie trained more for the London Marathon this year, so her speed increased. By what percentage did her time decrease?

Balancing the Books

Stage: 3 Short Challenge Level: Challenge Level:1
300 000 visitors are needed this week.

Over a two-week period, the required number of visitors is 14 x 30 000 = 420 000. Hence the number required this week is 420 000 - 120 000 = 300 000.

This problem is taken from the UKMT Mathematical Challenges.