Least Common Multiple (LCM) of 70 and 45
The least common multiple (LCM) of 70 and 45 is 630.
What is the Least Common Multiple (LCM)?
The LCM of two integers is the smallest positive integer that is divisible by both numbers. It is often used to find common denominators and solve problems involving periodic events.
Formula for LCM
The LCM of two numbers can be calculated using their GCD:
LCM(a, b) = |a × b| ÷ GCD(a, b)
How to Calculate the LCM of 70 and 45?
First, calculate the GCD of 70 and 45 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 70 ÷ 45 = 1 remainder 25 |
| 2 | 45 ÷ 25 = 1 remainder 20 |
| 3 | 25 ÷ 20 = 1 remainder 5 |
| 4 | 20 ÷ 5 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 33 and 43 | 1419 |
| 109 and 129 | 14061 |
| 73 and 20 | 1460 |
| 114 and 161 | 18354 |
| 21 and 154 | 462 |