# Two Numbers

Find two numbers whose sum is 13 and product is 36.

Find two numbers whose sum is 19 and product is 70.

Find two numbers whose sum is 15.5 and product is 60.

## A Mathematics Lesson Starter Of The Day

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• Mr Jankowski, Haydock Sports College
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• Very nice as it can be used to lead into factorising quadratics.
• Matt Robey, Brighton Hill School
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• This was really easy. I got the last one on the first guess!
• Chris And Phillip, Swansea
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• The first question is really easy and can be spotted quite quickly.
The third question always has to be an even number multiplied by a number ending in 0.5
chow.
• Mr Spanion, Ejs
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• I thought it was brilliant.
• Mr M Shepherd, St Lawrence Academy, Scunthorpe
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• Easiest way to solve these we found was to double the "sum" number. This means that both the two original numbers have doubled so we need to multiply the product number by 4. This gave us all whole numbers to deal with. Once solved, half both the numbers.
(Prime factor breakdown is the best way to look at combinations systematically if needed to, although most of year 8 relied on trial and error to find the abswer once they'd found the whole numbers).
• Transum,
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• This one of those starters that is generated with random numbers. Each time you load this page a new set of numbers appear in the statements above. You can use it many times over the course of the year so that your pupils are reminded of the techniques and have regular practice applying them.

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