GCF(37, 45) = 1.
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Because 4 is the largest positive integer that divides evenly into both 28 and 72 with no remainder.
2. That is the biggest number that divides evenly into both 8 and 10.
Since 20 is a factor of 60, it is automatically the GCF. You can't find a factor of 20 larger than 20.
That unknown third number might change the answer but the GCF of 40 and 16 is 8.
In mathematics, a factor is a number that divides another number without leaving a remainder. A multiple is a number that can be divided evenly by another number. In this case, 6 is both a factor and a multiple of itself, as it can be divided evenly by 1, 2, 3, and 6.