Same Same

A Maths Starter of The Day

Christopher and Alyssa

Christopher and Alyssa are both the same age.

Christopher multiplied his age by four, subtracted six then multiplied the answer by three.

Alyssa multiplied her age by eleven then added two

Christopher and Alyssa arrived at the same answer as each other.

How old are Christopher and Alyssa?

Topics: Starter | Algebra | Simultaneous Equations

  • Transum,
  • Tuesday, April 29, 2014
  • "It can be seen from the mean score this page has received that it is quite popular and 'achieved the results I required'. It is not clear however whether it is more popular with the younger children who might even use a trial and improvement strategy or whether it is more popular with older pupils who realise that they can use the techniques learned in algebra to solve this problem."

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Let Christopher and Alyssa be x years old.

3(4x - 6) = 11x + 2

12x - 18 = 11x + 2

x = 20

Christopher and Alyssa are both twenty years old.

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