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120 and 240 are both correct answers to your first problem. For the second problem you are looking for a number that is a multiple of 2, a multiple of 4 and a multiple of 5. $2 \times 5 = 10$ is a multiple of $2$ and $5$ but not $4. \; 4 \times 5 = 20$ is a multiple of 2, 4 and 5 so $20$ is a correct answer. Is there another correct answer? Penny
 


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