The GCF of consecutive even numbers is 2.
The GCF is 2.
The GCF is 2.
2 actually it also can be 4
The HCF of both numbers is 2
No, 2 and 10 are factors of 20. The LCM of 2 and 10 is 10.
Two numbers that are 2 apart cannot both be multiples of 3 or greater, as there would not be enough space to add the amount on to the lower number. Thus the greatest possible common factor would be 2. Both of the numbers are even, and so can divide by two. Thus we know the HCF of two consecutive even numbers must be 2.
To have a HCF, you need at least 2 numbers. There is no HCF in just 1 number.
You cannot. The numbers 2 and 12 have hcf = 2 and LCM = 12 The numbers 4 and 6 also have hcf = 2 and LCM = 12 So if you just knew the hcf and LCM you would not know which of the two was the required pair.
6 and 8
2 and 12
None. But 4 and 6 have a LCM (not LMC) of 12 and HCF of 2.
2 and 20