Alexis thinks of a number.

She multiplies this number by 7 then subtracts 6.

Her answer is 50. What was Alexis's original number?

Alexis's friend thinks of a number.

She then does the following operations:

Multiply by 3, subtract 7, multiply by 2 then add 49 (in that order). She finds that the number she ends up with is 13 times her original number.

What was Alexis's friend's original number?

## A Mathematics Lesson Starter Of The Day

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Topics: Starter | Algebra | Functions

• Teacher, Derbyshire
•
• Used this as a plenary question to a year 8 lesson on solving equations with x on both sides. Good challenge both in setting up the equation and then solving it.
• Teacher, Surrey
•
• When checking answer, it only works on non-scientific calculators as they do not apply BIDMAS!!
• Mr J, Balshaws
•
• We found this starter very interesting. Harry really loved it!!!

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This starter has scored a mean of 2.7 out of 5 based on 543 votes.

Previous Day | This starter is for 11 April | Next Day

Too difficult? There are some simpler questions like this on the THOAN Starter page.

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 the button above to regenerate another version of this starter from random numbers.

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I had been tutoring the wonderful Betsy for five years. When the day came for our last ever session together before the end of her Year 13, I received this beautiful book as a gift of appreciation.

This a very readable book by Ben Orlin. I'm really enjoying the humour in the writing and the drawings are great.

Ben Orlin answers maths' three big questions: Why do I need to learn this? When am I ever going to use it? Why is it so hard? The answers come in various forms-cartoons, drawings, jokes, and the stories and insights of an empathetic teacher who believes that mathematics should belong to everyone.

 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=April11

Here is the URL which will take them to the Think Of A Number exercise.

Transum.org/go/?to=THOAN

Here is the URL which will you to our eQuation Generator which provides unlimited practice solving linear equations.

Transum.org/go/?to=eQuation

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