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'Powerful Factors' printed from https://nrich.maths.org/
For practice in factorising polynomials.
Key question
What is the highest power of 5 we can find using a
calculator?
Can we factorise this expression to get factors involving smaller
powers of 5, so that all the powers of 5 can be found using a
calculator?
Howdo you know if a number is divisible by 3?