How do we define LCM?

LCM, abbreviation for least common multiple, is defined as the smallest number that is the product of two or more numbers 132 and 15

Properties of LCM

  • The LCM of two given numbers is never less than any of those numbers. Eg- LCM of 132 and 15 is 660, where 132 and 15 are less than 660.
  • LCM is associative which means LCM(132, 15) = LCM(15, 132).
  • 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 or more prime numbers is their product.

Steps to find lcm of 132 and 15 by Listing Method

Example: Find lcm of 132 and 15 by Listing Method

  • Multiples of 132: 132, 264, 396, 528, 660, 792, 924, 1056, 1188, 1320, 1452, 1584, 1716, 1848, 1980
  • Multiples of 15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375, 390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, 735, 750, 765, 780, 795, 810, 825, 840, 855, 870, 885, 900, 915, 930, 945, 960, 975, 990, 1005, 1020, 1035, 1050, 1065, 1080, 1095, 1110, 1125, 1140, 1155, 1170, 1185, 1200, 1215, 1230, 1245, 1260, 1275, 1290, 1305, 1320, 1335, 1350, 1365, 1380, 1395, 1410, 1425, 1440, 1455, 1470, 1485, 1500, 1515, 1530, 1545, 1560, 1575, 1590, 1605, 1620, 1635, 1650, 1665, 1680, 1695, 1710, 1725, 1740, 1755, 1770, 1785, 1800, 1815, 1830, 1845, 1860, 1875, 1890, 1905, 1920, 1935, 1950, 1965, 1980

Hence, LCM of 132 and 15 is 660.

Steps to find LCM of 132 and 15 by Common Division Method

Example: Find lcm of 132 and 15 by Common Division Method

2 132 15
2 66 15
3 33 15
5 11 5
11 11 1
1 1

Hence, LCM of 132 and 15 is 2 x 2 x 3 x 5 x 11 = 660.

Steps to find lcm of 132 and 15 by Formula

Example: Find lcm of 132 and 15 by Formula

  • GCF of 132 and 15 = 3
  • LCM of 132 and 15 = (132 x 15) / 3
  • => 1980 / 3

Hence, LCM of 132 and 15 is 660.

Examples

Ram and Deepika are running on a circular track. They start at the same time. They take 132 and 15 minutes respectively to go round once. Find at what time they will run together?

Ram and Deepika are running on a circular track. They take 132 and 15 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 132 and 15.
So, LCM of 132 and 15 is 660.

A shopkeeper sells candies in packet of 132 and chocolates in packet of 15. 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 132 and 15.
So, LCM of 132 and 15 is 660.

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

Greatest common factors or gcf of 132 and 15 is GCF(132, 15) * LCM(132, 15) = (132 x 15) / GCF(132, 15) = 660.

Sammy's company prints 132 textbooks at a time. Daniel's company prints textbooks in sets of 15 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 132 and 15.
So, LCM of 132 and 15 is 660.

Mary exercises every 132 days and Nikki every 15 days. They both excercised today. How many days will it be until they excercise together again?

The problem can be solved using LCM, because we are trying to figure out the least time until they excercise together again.
So, LCM of 132 and 15 is 660.

Find the least common multiple of 132 and 15.

Least common multiple of 132 and 15 is 660.

Find the least number which is exactly divisible by 132 and 15.

Least number which is exactly divisible by 132 and 15 is 660.