The factors of 648 are:
1 2 3 4 6 8 9 12 18 24 27 36 54 7281 108 162 216 324 648
The factors of 720 are:
1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 36 40 45 48 60 72 80 90 120 144 180 240 360 720
We can see from list list that the greatest common factor is 72
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The GCF is 40.
The GCF is 72.
The prime factors of 720 are 2, 2, 2, 2, 3, 3, and 5. The prime factors of 450 are 2, 3, 3, 5, and 5. The prime factors they have in common are 2, 3, 3, and 5, so the greatest common factor is 2 x 3 x 3 x 5 = 90.
Well, honey, the highest common factor of 405 and 720 is 45. It's like finding the biggest slice of cake you can share between those two numbers - in this case, it's a slice of 45. So, there you have it, 45 is the boss when it comes to dividing up 405 and 720.
144 216 288 360 432 504 576 648 720 and so on ...