1. The product of two odd numbers is 117.

What are they?

2. The difference between two square numbers is 12.

What are they?

3. The sum of three prime numbers is 19.

What are they?

4. The ratio of two even numbers is 9:1.

What are they?

## A Mathematics Lesson Starter Of The Day

Topics: Starter | Arithmetic | Number | Puzzles | Ratio

• C. J. Southward, Limehouse Cumbria
•
• In the product question the solutions do not include the double negative
solutions.
• Transum,
•
• Thanks CJ. That has now been allowed for in the answers below.
• 6N, Charnwood Primary School
•
• We really enjoyed this and some of us thought it was easy - However we haven't tried the hard numbers yet!
• Ms Robyn, ABCIS In Vietnam
•
• This was fun, the harder numbers made us think! We were very pleased that some of us managed to get the product answer to the 'hard' level without a calculator.

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.

Previous Day | This starter is for 4 June | Next Day

1. 1 and 117 or 3 and 39 or 9 and 13 (and their negatives).

2. 4 and 16. Could there be any other solutions?

3. 3, 3 and 13 or 3, 5 and 11 or 5, 7 and 7.

4. 18 and 2 or 36 and 4 or 54 and 6 or ...

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