What is LCM?

In mathematics, least common multiple, which is ordinarily reffered to as LCM is characterized as the smallest non-zero number which is divisible by both given numbers 9 and 24.

Properties of LCM

  • The LCM of two or more prime numbers is exactly equal to their product.
  • LCM is associative which means LCM(9, 24) = LCM(24, 9).
  • LCM is commutative which means LCM(a, b, c) = LCM(LCM(a, b), c) = LCM(a, LCM(b, c)).
  • LCM is distributive, which means LCM(ab, bc, ad) = d * LCM(x, y, z).
  • The LCM of two given numbers is always greater than the given numbers numbers. Eg- LCM of 9 and 24 is 72, where 72 is greater than 9 and 24.

Steps to find lcm of 9 and 24 by Listing Method

Example: Find lcm of 9 and 24 by Listing Method

  • Multiples of 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, 117, 126, 135, 144, 153, 162, 171, 180, 189, 198, 207, 216
  • Multiples of 24: 24, 48, 72, 96, 120, 144, 168, 192, 216

Hence, LCM of 9 and 24 is 72.

Steps to find LCM of 9 and 24 by Common Division Method

Example: Find lcm of 9 and 24 by Common Division Method

2 9 24
2 9 12
2 9 6
3 9 3
3 3 1
1 1

Hence, LCM of 9 and 24 is 2 x 2 x 2 x 3 x 3 = 72.

Steps to find lcm of 9 and 24 by Formula

Example: Find lcm of 9 and 24 by Formula

  • GCF of 9 and 24 = 3
  • LCM of 9 and 24 = (9 x 24) / 3
  • => 216 / 3

Hence, LCM of 9 and 24 is 72.

Examples

Franky and Joy are running on a circular track. They start at the same time. They take 9 and 24 minutes respectively to go round once. Find at what time they will run together?

Franky and Joy are running on a circular track. They take 9 and 24 minutes respectively to go round once. We need to find out at what time (minimum) they will run together again. For this we need to find the LCM of 9 and 24.
So, LCM of 9 and 24 is 72.

A shopkeeper sells candies in packet of 9 and chocolates in packet of 24. What is the least number of candies and chocolates Annie should buy so that there will be one candy for each chocolate?

The least number of candies and chocolates Annie should buy so that there will be one candy for each chocolate we need to find the lcm of 9 and 24.
So, LCM of 9 and 24 is 72.

Boxes that are 9 inches tall are being pilled next to boxes that are 24 inches tall. What is the least height in feet at which the two piles will be the same height?

To find the least height in feet at which the two piles will be at same height we will find LCM of 9 and 24.
So, LCM of 9 and 24 is 72.

Sammy's company prints 9 textbooks at a time. Daniel's company prints textbooks in sets of 24 at a time. According to a survey done by a committee, both companies printed the same number of textbooks last year. Find the least number of books that each company would have printed.

To find the least number of textbooks that each company could have printed we need to find the LCM of 9 and 24.
So, LCM of 9 and 24 is 72.

What is the relation between LCM and GCF( Greatest Common Factor)?

Greatest common factors or gcf of 9 and 24 is GCF(9, 24) * LCM(9, 24) = (9 x 24) / GCF(9, 24) = 72.

Find the least number which is exactly divisible by 9 and 24.

Least number which is exactly divisible by 9 and 24 is 72.

Find the LCM of 9 and 24 using GCF method.

Greatest common factor or gcf of 9 and 24 is GCF(9, 24) x LCM(9, 24) = (9 x 24) / GCF(9, 24) = 72.