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Question
The smallest number that is a multiple of both 3 and 7 is:
Options
10
14
21
24
MCQ
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Solution
21
Explanation:
-
Multiples of 3:
3, 6, 9, 12, 15, 18, 21, 24, ... -
Multiples of 7:
7, 14, 21, 28, ...
Common multiples: 21, 42, 63, ...
Smallest (least) common multiple = 21
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