Double Treble

Puzzle 1: Arrange the given digits to make three 3 digit numbers such that the second is double the first and the third is three times the first. 4 digits have been positioned already.

×2=
×3=

1

2

3

4

5

6

7

8

9

Double Treble is based on a puzzle called Digital Multiplication described in the book Hoard of Mathematical Treasures by Ian Stewart.

There are many other puzzles similar to this to be found on the Maths Puzzles page.

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"Love using the Starter of the Day activities to get the students into Maths mode at the beginning of a lesson. Lots of interesting discussions and questions have arisen out of the activities.
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23 or Bust

A game involving mental arithmetic and strategy for two players or one player against the computer. It is possible to beat the computer but you need a well thought out strategy.

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Go Maths

Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths main page links to more activities designed for students in upper Secondary/High school.

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