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To find the LCM of two numbers, you need to split them up into their prime factors first:

32=2x2x2x2x2

45=3x3x5

The next stage would be to identify any common factors, but as there are none we simply take all of these factors and multiply them together:

2x2x2x2x2x3x3x5=1,440

And so the LCM of 32 and 45 is 1,440

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Q: What is the lcm of 32 an 45?
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