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6 October, 10:50

How many 2-digit numbers are multiples of both 5 and 7?

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  1. 6 October, 11:20
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    2: 35 and 70

    Explanation:

    1. The LCM of 5 and 7: 35

    2. 35 * 2 = 70

    3. 35 * 3 = 105, not 2-digit

    So, the only 2-digit numbers that are multiples of both 5 and 7 are 35 and 70, so 2.
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