Prime numbers have two factors. 2, 3 and 5 are prime numbers.
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Of the numbers from 1 to 30, only 30 has all three of those numbers as factors.
Three numbers.
Factors are numbers that multiply to create products. 2 x 3 = 6. Two and three are factors of six. Six is the product of two and three.
The common factors are: 1, 2, 5, 10.
Numbers without factors are PRIME Numbers. Taking the first ten numbers. 1,2,3,4,5,6,7,8,9,10. The prime numbers are 2,3,5,7, they have no factors. 4,6,8,9,10. Are not prime numbers as they have factors. 4 has a factor of '2' 6 has factors of '2 & 3'. 8 has factors of' 2 & 4'. or' 2,2,2.' 9 has factors of '3,3', 10 has factors of '2 5.' '1' is unique