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2 August, 02:33

What number adds 10 and multiplies 21

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  1. 2 August, 04:43
    0
    The numbers are 7 and 3.

    7 + 3 = 10

    7 x 3 = 21

    It is easier to factor 21 than to find the addends of 10.

    1, 3, 7, 21 - are factors of 21

    1, 2, 3, 4, 5, 6, 7, 8, 9 - are addends of 10. Which is more numbers to consider than the factors of 21.
  2. 2 August, 06:07
    0
    7 and 3. 7+3=10 and 7x3=21
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