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Topics: Starter | Logic

• Ben Shapland, Queen's Taunton
•
• This is on Die Hard 3, full title "Die Hard with a Vengance". I want to be a cop when I grow up.
• 5G, Sheffield
•
• We thought this was a tricky problem to start with but we got there in about 5 minutes.
• Brain Food,
•
• You're a cook in a restaurant in a quaint country where clocks are outlawed. You have a four minute hourglass, a seven minute hourglass, and a pot of boiling water. A regular customer orders a nine-minute egg, and you know this person to be extremely picky and will not like it if you overcook or undercook the egg, even by a few seconds. What is the least amount of time it will take to prepare the egg, and how will you do it?
• Transum,
•
• Thanks 'Brain Food' for the egg timer puzzle. If you know of any similar or related puzzles please leave a comment here.
A key aspect of this challenge is to come up with a system of recording the moves so that someone else can understand your solution. Your pupils are bound to come up with inventive and unique ways of doing this. Please let us know!
• James Pennington, All Hallows Catholic High School
•
• Great could not be better I would like to see more like this.

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This starter has scored a mean of 3.4 out of 5 based on 687 votes.

Previous Day | This starter is for 19 February | Next Day

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click a button above to regenerate another version of puzzle.

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 Teacher, do your students have access to computers?Do they have iPads or Laptops in Lessons? Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Transum.org/go/?Start=February19

Here is the URL which will take them to the student version of this activity.

Transum.org/go/?to=jugs

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