Least Common Multiple (LCM) of 49 and 70
The least common multiple (LCM) of 49 and 70 is 490.
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 49 and 70?
First, calculate the GCD of 49 and 70 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 49 ÷ 70 = 0 remainder 49 |
| 2 | 70 ÷ 49 = 1 remainder 21 |
| 3 | 49 ÷ 21 = 2 remainder 7 |
| 4 | 21 ÷ 7 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 67 and 170 | 11390 |
| 11 and 198 | 198 |
| 15 and 115 | 345 |
| 106 and 192 | 10176 |
| 129 and 63 | 2709 |