Q: Use of HCF and LCM in daily life?

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2 and 20 have an HCF of 2 and an LCM of 20. You could also use 4 and 10.

Chefs, carpenters, anyone who has to add, subtract or simplify fractions.

When we simplify fractions.

To find the LCM of these values, we need to factor out each term. 28 = 2² x 7 36 = 6 x 6 = 2² x 3² Select the prime factor with the highest exponent and multiply all the "available" primes. The LCM turns out to be: LCM = 2² x 3² x 7 = 252. Therefore, the LCM of 28 and 36 is 252.

The hcf is useful in reducing fractions to their lowest terms and the lcm is useful in finding the lowest common denominator of fractions that have different denominators that need to be added or subtracted.

Related questions

LCM is used to find the lowest common denominator in fractions HCF is used to reduce fractions to their simplest terms

If you are a teacher who works with 27 pupils and 18 pupils and

The HCF helps when reducing fractions. The LCM helps when adding or subtracting fractions.

In finding the LCM or HCF of two or more numbers

You would use it when adding fractions.

weighing scales

You use the LCM when you want to add or subtract fraction and then you can use the HCF to simplify the result. You may want to do this when budgeting: for example one quarter of your pay goes on rent, two fifths goes on food and drink, and so on. So how much of your pay is available for discretionary spending?

Use GCF instead of HCF. 6 and 30 would be those numbers...

2 and 20 have an HCF of 2 and an LCM of 20. You could also use 4 and 10.

Chefs, carpenters, anyone who has to add, subtract or simplify fractions.

Any job where you need to add or subtract fractions.

you are doing it right now. Unless you are dead, then that means I'm discussing this with a zombie.