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Q: What is the HCF and LCM of 3 and 18?

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3 and 18 do.

18 and 3

3 and 18

LCM=18=2*32 HCF(guess that is what u meant, highest common factor)=3 Possibilities: 3 and 18, 6 and 9, three or all of the numbers together. Note: 3 and 6 gives a LCM of 6 3 and 9 gives a LCM of 9 6 and 18 gives a HCF of 6 9 and 18 gives a HCF of 9 Three or four out of the numbers (3,6,9 and 18) will give you LCM of 18 and HCF of 3 as well.

LCM is Least Common Multiple of 2 or more numbers. So, LCM of 1 number i.e. 18 is not defined. Similarly, HCF is Highest Common Factor of 2 or more numbers. So, HCF of 1 number i.e. 3 is not defined.

9 and 6

They are: 6 and 9

They are 9 and 6

The LCM is: 126

Factors: 15 = 3 x 5, 18 = 2 x 3 x 3. The LCM of two numbers = their product divided by their HCF. In this instance the product is 270 and the HCF is 3 so the LCM is 90.

3 and 18 6 and 9

Two or more numbers are needed to solve for HCF or LCM.

lcm(9, 12) = 36; hcf(9, 12) = 3.

18 = 2 * 3 * 370 = 2 * 5 * 7Thus:LCM = 2*3*3*5*7 = 630HCF = 2

The GCF is 3.

HCF of 12 and 18 is 6 and LCM of 108 and 72 is 216 So: 6 times 216 = 1296

3 and 9.

12 and 18

36 and 6 18 and 12

The GCF is 3. The LCM is 120.

LCM is 20 and the hcf is 10

The GCF is 3.

3

3 and 30

3 and 12