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How do you work out LCM and HCF in maths?

Anonymous

∙ 10y ago

Updated: 9/22/2023

Example: 30 and 42

Factor them.

2 x 3 x 5 = 30

2 x 3 x 7 = 42

Select the common factors.

2 x 3 = 6, the GCF

Select the highest amount of each factor.

2 x 3 x 5 x 7 = 210, the LCM

Check it.

30 x 42 = 1260

210 x 6 = 1260

It checks.

Wiki User

∙ 10y ago

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Continue Learning about Math & Arithmetic

What is the HCF and LCM of 70 and 72?

The HCF is: 2The LCM is: 2,520

What is the HCF and LCM of 42 and 84?

hcf = 42, lcm = 84.

What is the HCF and the LCM of 144 and 192?

HCF is 48 and LCM is 576

What is the HCF and LCM of the numbers 526 and 213?

hcf: 1 lcm: 112,038

Can HCF and LCM of two numbers be 27 and 288?

No. The LCM MUST be a multiple of the HCF.

Related Questions

What does LCM mean in maths terms?

it means lowest common multiple. the opposite to it is hcf or highest common factor ^_^

What is the LCM of 10and20 to their hcf?

LCM is 20 and the hcf is 10

Why you need LCM and HCF in maths?

It's kind of an inverse relationship. The product of the GCF and LCM of two numbers is the same as the product of the original two numbers, so as the GCF increases, the LCM decreases and vice versa. LCM is divisable by HCF.

What is the HCF and LCM of 70 and 72?

The HCF is: 2The LCM is: 2,520

What Is The Hcf And Lcm 120 And 180?

HCF is 60 and the LCM is 360

What is the HCF and LCM of 3 and 18?

HCF = 3... LCM = 18 !

What is the HCF and LCM of 42 and 84?

hcf = 42, lcm = 84.

What is the HCF and the LCM of 144 and 192?

HCF is 48 and LCM is 576

Can the HCF of two numbers be a factor of their LCM?

The HCF is always a factor of the LCM of two numbers. The HCF is a factor of both the numbers which are factors of their LCM. Thus the HCF is also a factor of the LCM of the two numbers.

What is the HCF and LCM of the numbers 526 and 213?

hcf: 1 lcm: 112,038

What is the hcf of 196?

i really need help on maths home work can you help me thank you the maths is hcf of prime factors of 196 60 and 28 primes factors 735 and 639 prim factors

Does the HCF of any two no is always a factor of their LCM?

If two numbers are expressed as ab and cb this is easier to work out. Assume that a and c have no common prime factors. Thus, the HCF of the two numbers will be b. The LCM is the two numbers multiplied by each other, divided by the HCF. So the LCM will be abc. b is a factor of abc, and so the HCF will always be a factor of their LCM.

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