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Question
What is the LCM of 11 and 9 ?
- 99
- 99
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Solution
The correct option is A 99
Let us first list down the multiples of 9 and 11.
Multiples of 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108 ... and so on.
Multiples of 11 are 11, 22, 33, 44, 55, 66, 77 , 88, 99, 110, ... and so on.
Common multiples of 9 and 11 are 99 ... and so on.
Since 99 is the smallest of them, it is the least common multiple (LCM) of 9 and 11.
Let us first list down the multiples of 9 and 11.
Multiples of 9 are 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108 ... and so on.
Multiples of 11 are 11, 22, 33, 44, 55, 66, 77 , 88, 99, 110, ... and so on.
Common multiples of 9 and 11 are 99 ... and so on.
Since 99 is the smallest of them, it is the least common multiple (LCM) of 9 and 11.
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