What is the least common multiple of 9 and 12?a)36b)45c)60d)72Correct ...
The multiples of 9 are: 9, 18, 27, 36, 45, ...
The multiples of 12 are: 12, 24, 36, 48, ...
The least common multiple of 9 and 12 is 36.
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What is the least common multiple of 9 and 12?a)36b)45c)60d)72Correct ...
Least Common Multiple (LCM) is the smallest positive integer that is divisible by two or more given numbers. To find the LCM of 9 and 12, we can use two different methods: prime factorization and the method of multiples.
Prime factorization method:
1. Find the prime factors of each number:
- Prime factors of 9: 3 * 3
- Prime factors of 12: 2 * 2 * 3
2. Identify the highest power of each prime factor:
- Highest power of 2: 2 * 2
- Highest power of 3: 3 * 3
3. Multiply the highest powers of each prime factor:
- 2 * 2 * 3 * 3 = 36
Therefore, the LCM of 9 and 12 is 36.
Method of multiples:
1. List the multiples of each number until you find a common multiple:
- Multiples of 9: 9, 18, 27, 36,...
- Multiples of 12: 12, 24, 36,...
2. The first common multiple in both lists is 36.
Therefore, the LCM of 9 and 12 is 36.
Conclusion:
The LCM of 9 and 12 is 36, which means that 36 is the smallest positive integer that is divisible by both 9 and 12. Hence, option 'A' (36) is the correct answer.
What is the least common multiple of 9 and 12?a)36b)45c)60d)72Correct ...
A