14.
42 = 2 x 3 x 7
98 = 2 x 72
hcf = 2 x 7 = 14
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The highest common factor is 14
The greatest common factor (GCF) is: 14.
The Greatest Common Divisor of 98, 42 is 14.
For the values: 98, 42, 36 the LCM is: 1,764
For 98, 154, 182 the GCF = 14