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Find the GCF of 45 and 75.
I will start by listing the factors of each.
Factors of 45: 1, 3, 5, 9, 15, 45
Factors of 75: 1, 3, 5, 15, 25, 75
The common factors are 1, 3, 5, and 15.
Which is the biggest? The biggest is 15.
So, the GCF of 45 and 74 is 15.
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I'm happy with your working and final answer.
Bob
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You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob
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I'm happy with your working and final answer.
Bob
Thank you, Bob. I try showing my work when time allows.
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Find the GCF of 45 and 75.
Another way is to do the prime factorization w/ a table:
factors
45: 3 * 3 * 5
75: 3 * 5 * 5
---+--------------
GCF: 3 * 5 = 15
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FelizNYC wrote:Find the GCF of 45 and 75.
Another way is to do the prime factorization w/ a table:
factors 45: 3 * 3 * 5 75: 3 * 5 * 5 ---+-------------- GCF: 3 * 5 = 15
The prime factorization method is cool.
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