Find the smallest number which is divisible by 12 15 and 20

- Find the smallest number which is divisible by 12 15 and 20 completely
- Find the smallest number which is divisible by 12 15 and 20 and is also a perfect square
- Find the smallest square number which is exactly divisible by 8 12 15 and 20
- Find the smallest number which is exactly divisible by 12 15 and 20
- Find the smallest square number which is divisible by 8 12 15 and 20
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