Answer:
12
Explanation:
You want the least common multiple of 3 and 4.
LCM
3 and 4 have no common factors, so their least common multiple (LCM) is their product:
3·4 = 12
The LCM of 3 and 4 is 12.
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Additional comment
If the numbers have a common factor, then the LCM is their product, divided by the greatest common factor.
For example, 4 and 6 have a common factor of 2. Their LCM is 4·6/2 = 12.
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