LCM of given numbers (and smallest number leaving a fixed remainder)

This type of question, asked 2 times: 18 Sep 2025 S2, 24 Sep 2025 S3. All 2 questions below, oldest first.

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Question 1
18 Sep 2025 S2
20 $Find the LCM of 12, 18, 30?$
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Question 2
24 Sep 2025 S3
5 $Find the smallest number which, when divided by 6, 8, and 10, leaves a remainder of 5 in each case.$
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