Their factors are:
735: 1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735
1575: 1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 175, 225, 315, 525, 1575
Their common factors are: 1, 3, 5, 7, 15, 21, 35, 105
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Common factors of 420, 735, and 945 are: 1, 3, 5, 7, 15, 21, 35, and 105.
It is: 3*5*7^2 = 735
The factors of 630 are: 1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 63, 70, 90, 105, 126, 210, 315, 630 The factors of 735 are: 1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735
735
Obtain the prime factors of both numbers. 450 = 2 x 3 x 3 x 5 x 5 735 = 3 x 5 x 7 x 7 The factors common to both numbers are 3 and 5. The GCF is 3 x 5 = 15