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1107572
Multiples, Factors & Primes
Description
Explanation of multiples, factors & primes
No tags specified
multples
factors
primes
numbers
whole
positive
maths
bsc (honours) mathematics
Mind Map by
Sarah Owen
, updated more than 1 year ago
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Created by
Sarah Owen
over 10 years ago
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Resource summary
Multiples, Factors & Primes
A prime number is a number greater than 1 which has only two factors: Itself & 1.
Prime numbers to 100: 2,3,5,7,11,13,17,19, 23,29,31,37,41,43,47, 53,59,61,67,71,73,79, 83,89,97
The sum of two prime numbers can be a prime number but only when one of the prime numbers is 2
2+3=5 2+5=7 2+11=13
A number written as the product of prime numbers is written in prime factor form
720 = 2 x 2 x 2 x 2 x 3 x 3 x 5 as prime factor form is 720 = 2(4) x 3(2) x 5 (brackets are to the power of)
2, 3, and 5 are prime factors of 720
Multiples of a number are the results of multiplying the number by a positive whole number.
15=3x5 308=4x7x11
15 is a multiple of 3 & also of 5
3 is a factor of 15. 5 is also a factor
308 is a multiple of 4, 7 & 11
4, 7 & 11 are factors of 308
The factors of a number are whole numbers that divide exactly into the number. The factor includes 1 & itself.
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