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# Greatest Common Divisor / Lowest Common Multiple

What is the largest number that can divide two numbers without a remainder? What is the smallest number that is divisible by two numbers without a remainder?

What is the least common multiple of \(2\) and \(3\)?

What is the lowest common multiple of 39 and 65?

If the lowest common multiple of \(3^a 5^b\) and \(3^4\) is \(3^5\), what is \(3^a 5^b ?\)

What is the least common multiple of 12 and 21?

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