Halve it to get 256

Halve it to get 128

- - -

Continue as far as possible

[Decimal fractions are allowed but calculators are not]

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Topics: Starter | Arithmetic | Number

• Teacher - to - be, England
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• I like this.. maybe give a few more numbers and get them to practise. Then try doubling.
• 7abM2, King Alfred's College, Oxfordshire UK
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• We found this a challenging puzzle. But in the 5mins we managed to write 27 numbers. Can you beat this?
• Class 9Ma1, Sheredes School
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• We discussed this and Stefan noticed that all the numbers ended in 5. We had a discussion and then further noticed that the numbers ended in 125 and 625 in rotation. The class wondered why this should be the case.
•

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This starter has scored a mean of 3.2 out of 5 based on 507 votes.

Previous Day | This starter is for 9 March | Next Day

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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=March9

Here is the URL which will provide a little light relief. It is a game based on the sequence of doubling numbers but might be best left till the last five minutes of the lesson as it is quite addictive!

Transum.org/go/?to=doubletake

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