Free resources for teaching and assessment of key mathematical processes for 11-16 year olds

Co-primes

Download resources:

Co-primes pupil stimulus Co-prime AMP investigation
Co-primes teacher notes
Co-primes progression table
Co-primes ALL documents

Description: Starting with a definition of what it means for integers to be co-prime, pupils investigate how many positive integers are less than and co-prime to any given positive integer.

Suitability: Pupils working at all levels;individuals or pairs.

Time: 1+hours

Equipment: Calculators, Computer spreadsheet

Key mathematical language: Factor, common factor, highest common factor, Prime, odd/even, integer, relatively prime