Oh, dude, you're hitting me with the math questions? Alright, so the prime numbers that are factors of those numbers are 2 and 5. Like, 2 goes into all of them, and 5 is in there too. So, yeah, those are the prime party crashers for 20, 30, 40, 50, and 60.
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Well, 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.
The prime numbers that are factors of 20, 30, 40, 50, and 60 are 2 and 5. These numbers are prime because they are only divisible by 1 and themselves. When you factorize each of the given numbers, you will find that 2 and 5 are common prime factors among them.
Prime numbers only have factors of 1 and themselves: 23, 29
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.
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.
7 + 13 = 20 Note that there are no two prime numbers x and y that multiply to 20.
2, 3, 5, 7, 11, 13, 17, and 19 each have two factors . . . '1' and itself.