The GCF is 1.
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The GCF is 5.
2 x 2 x 5 x 7 = 140 5 x 9 x 9 = 405 HCF is 5 LCM is 11,340
5
3.
9= 3x3 12= 2x2x2x2x3 HCF = 3
The GCF is 9.
The GCF is 9.
18
The HCF is 1.
The HCF is 1.
lcm(9, 12) = 36; hcf(9, 12) = 3.
The HCF of 4 and 5 is 1.