LCM of 40 and 21 is 840
LCM stands for least common multiple. In mathematics, LCM of two numbers 40 and 21, is defined as the smallest positive integer that is divisible by both. It is written as LCM(40, 21).
Hence, LCM of 40 and 21 is 840.
| 2 | 40 21 |
| 2 | 20 21 |
| 2 | 10 21 |
| 3 | 5 21 |
| 5 | 5 7 |
| 7 | 1 7 |
| 1 1 |
Hence, LCM of 40 and 21 is 2 x 2 x 2 x 3 x 5 x 7 = 840.
Hence, LCM of 40 and 21 is 840.
Franky and Joy are running on a circular track. They take 40 and 21 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 40 and 21.So, LCM of 40 and 21 is 840.
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 40 and 21.So, LCM of 40 and 21 is 840.
Given that the cricket team plays every 40 days and the basketball team plays every 21 days, so for finding the next time when both teams will play again we need to find the LCM of 40 and 21.So, LCM of 40 and 21 is 840.
To find the least number of textbooks that each company could have printed we need to find the LCM of 40 and 21.So, LCM of 40 and 21 is 840.
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 40 and 21 is 840.
Greatest common factors or gcf of 40 and 21 is GCF(40, 21) * LCM(40, 21) = (40 x 21) / GCF(40, 21) = 840.
Least number which is exactly divisible by 40 and 21 is 840.