Contents
Intermediate Number
Topic 1a:
Arithmetic
Factors & multiples 3
This display is based on a typical GCSE examination question. You can change some of the details in the question and then see the answer, step by step.
A
factor
is a whole number that divides exactly into another number. A
prime number
is a number with only two factors: itself and 1. The first prime numbers are 2, 3, 5, 7, 11, 13...
The diagram is a factor tree, showing the prime factors of 12.
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