pptx, 84.12 KB
pptx, 84.12 KB
pdf, 277.51 KB
pdf, 277.51 KB

Based on the old BBC quiz (with Bob Monkhouse). There are some numbers on the board that MAY be prime numbers. The objective is for students to ‘bid’ on how many numbers they can see that are definitely NOT prime numbers.

This activity is intended for use as a plenary - it relies on knowledge of prime numbers but also tests students knowledge of some basic divisibility tests (all of the non-prime numbers can be divided by easily checked numbers like 3 or 4).

I’ve also included the slides in a “matching cards” format that can be cut out and given to students to sort into “true” or “false” on their desks (or in small groups).

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