18 and 45
so you do
18 = 2x2x3
45=5x3x3
hcf =3x3 =9
the answer is 9
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15
The highest common factor for 18 and 16 is 2.
The Greatest Common Factor (GCF) of 144, 45, and 18 is 9.
the highest common factor of the numbers 12, 16 and 18 is 2.
45 and five's highest common factor is five.