Brooklyn thinks of a number.

She multiplies this number by 8 then subtracts 8.

Her answer is 56. What was Brooklyn's original number?

Brooklyn's friend thinks of a number.

She then does the following operations:

Multiply by 2, subtract 7, multiply by 3 then add 53 (in that order). She finds that the number she ends up with is 10 times her original number.

What was Brooklyn's friend's original number?

## A Mathematics Lesson Starter Of The Day

Topics: Starter | Algebra | Functions

• Teacher, Derbyshire
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• 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!!!

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.

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