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Ross
Lao
FranWell, honey, the two prime numbers that are factors of all those numbers are 2 and 5. They may not be the life of the party, but they sure know how to divide those multiples like a pro. So, next time you're stuck with numbers like these, just remember to call on good ol' 2 and 5 to save the day.
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What is the prime numbers of 20-30?
Prime numbers only have factors of 1 and themselves: 23, 29
What numbers below 20 have 2 factors?
A number will always have 1 and itself as factors. And thus the only numbers with 2 factors will be prime numbers. The only prime numbers below 20 are 2, 3, 5, 7, 11, 13, 17 and 19, and thus these are the only numbers below 20 that have 2 factors.
What is the GCF of 28 20 and 40?
To find the GCF, you first need to break the numbers down into their prime factors: 28 = 2x2x7 20 = 2x2x5 40 = 2x2x2x5 The next step is to find any common prime factors. In this case, all three numbers have two 2s as prime factors. Multiply these and you get 4. Therefore the GCF of 28, 20 and 40 is 4.
What 2 prime numbers equal 20?
7 + 13 = 20 Note that there are no two prime numbers x and y that multiply to 20.
What is a number between 0 and 20 that has two factors?
2, 3, 5, 7, 11, 13, 17, and 19 each have two factors . . . '1' and itself.
