What is LCM of two numbers?

In mathematics, least common multiple which is commonly known as LCM is defined as the smallest non-zero number which is divisible by both given numbers 41 and 30.

Properties of LCM

  • The LCM of two or more prime numbers is exactly equal to their product.
  • LCM is associative which means LCM(41, 30) = LCM(30, 41).
  • 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 41 and 30 is 1230, where 1230 is greater than 41 and 30.

Steps to find lcm of 41 and 30 by Listing Method

Example: Find lcm of 41 and 30 by Listing Method

  • Multiples of 41: 41, 82, 123, 164, 205, 246, 287, 328, 369, 410, 451, 492, 533, 574, 615, 656, 697, 738, 779, 820, 861, 902, 943, 984, 1025, 1066, 1107, 1148, 1189, 1230
  • Multiples of 30: 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, 330, 360, 390, 420, 450, 480, 510, 540, 570, 600, 630, 660, 690, 720, 750, 780, 810, 840, 870, 900, 930, 960, 990, 1020, 1050, 1080, 1110, 1140, 1170, 1200, 1230

Hence, LCM of 41 and 30 is 1230.

Steps to find LCM of 41 and 30 by Common Division Method

Example: Find lcm of 41 and 30 by Common Division Method

2 41 30
3 41 15
5 41 5
41 41 1
1 1

Hence, LCM of 41 and 30 is 2 x 3 x 5 x 41 = 1230.

Steps to find lcm of 41 and 30 by Formula

Example: Find lcm of 41 and 30 by Formula

  • GCF of 41 and 30 = 1
  • LCM of 41 and 30 = (41 x 30) / 1
  • => 1230 / 1

Hence, LCM of 41 and 30 is 1230.

Examples

Franky and Joy are running on a circular track. They start at the same time. They take 41 and 30 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 41 and 30 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 41 and 30.
So, LCM of 41 and 30 is 1230.

A shopkeeper sells candies in packet of 41 and chocolates in packet of 30. 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 41 and 30.
So, LCM of 41 and 30 is 1230.

Boxes that are 41 inches tall are being pilled next to boxes that are 30 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 41 and 30.
So, LCM of 41 and 30 is 1230.

Sammy's company prints 41 textbooks at a time. Daniel's company prints textbooks in sets of 30 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 41 and 30.
So, LCM of 41 and 30 is 1230.

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

Greatest common factors or gcf of 41 and 30 is GCF(41, 30) * LCM(41, 30) = (41 x 30) / GCF(41, 30) = 1230.

Find the least number which is exactly divisible by 41 and 30.

Least number which is exactly divisible by 41 and 30 is 1230.

Find the LCM of 41 and 30 using GCF method.

Greatest common factor or gcf of 41 and 30 is GCF(41, 30) x LCM(41, 30) = (41 x 30) / GCF(41, 30) = 1230.