17 Mar Shortcuts explained: How to find LCM, How to find HCF? How to solve LCM-HCF related problems without mugging up any formulas?. Common Factors. Highest Common Factor (H.C.F). Finding H.C.F. of Big Numbers. Multiples. Common Multiples. Lowest Common Multiple (L.C.M.). Finding. Least Common Multiple of 3 and 5: List the Multiples of each number,. The multiples of 3 are 3, 6, 9, 12, 15, 18, etc. The multiples of 5 are 5, 10, 15, 20, 25, .

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LCM is also important for circular racetracks, bells, blinking lights, etc.

Find common multiples of 3 and 5. Multiples of 5 are 5,10, 15 ,20,25, ans ,35, HCF of prime numbers 13,29 Prime numbers donot have any common factors.

Prime numbers donot have any common factors. HCF of two numbers 4, 6 First make prime factors of given numbers.

## Least Common Multiple

In other words, 1 is the factor of both 4 and 6. For example, the L.

Hcf and lcm gives us alot of concepts to find hcf and lcm quickly. When you multiply a given whole number by any other whole numberthe result is a multiple of that number. Find the Highest Common Factor H. But this is not always true for three numbers. Ans HCF 4,6 There is a 4x 6cm floor. M of smaller numbers is to write down the multiples of the larger number until one of them is also a multiple of the smaller number.

For wnd Numbers HCF 12,15,20 1 so it is smaller than smallest number 12 15,30 On the other hand, consider this number: When two or more numbers have the same factorthat factor is called a common factor. Tarak Mehta takes 4 minutes to finish it and Jethalal takes 6 minutes to finish it. Write all prime numbers 2,3 and7 in ascending order.

### The Highest Common Factor (HCF) and the Lowest Common Multiple (LCM).

HCF is also important for remainder related questions. Multiples of 3 are 3,6,9,12, 15 ,18,21,24,27, 30 ,33, So how to quickly find LCM of two or three numbers? In case of co-prime numbers, just multiply them and you will get LCM.

Can you tutorual it? Write down all multiples of 3 greater than 10 but smaller than Similarly if I divide 6 by 2, I get zero remainder.

### Unit 2 Section 4 : Highest Common Factor and Lowest Common Multiple

For any given numbers, their LCM is always greater than or equal to the biggest number. Multiples of 4 are: In other words, 2 is the factor tutirial both 4 and 6. The prime numbers less than 20 are 2,3,5,7,11,13,17, The best way is to keep finding the factors of the smaller number, starting from the largest factor.

For Parents or Teachers: I suggest you solve the the illustration examples as well. The factors of 10 are 1, 2, 5, But for the sake of conceptual clarity. There are many tricks, the easiest one is prime-factorization. The multiples of 3 are 3, 6, 9, 12, 15, 18, The multiples of 4 are: M is the smallest number that is a common multiple of two or more numbers.