915.
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Use a factor tree. 364 182,2 91,2,2 13,7,2,2 2 x 2 x 7 x 13 = 364
90/2 = 45/3 = 15/3 = 5/5 = 1 2 x 3 x 3 x 5 = 90
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The eight related multiplication and division equations for the numbers 6, 15, and 90 are as follows: 6 x 15 = 90 15 x 6 = 90 90 ÷ 6 = 15 90 ÷ 15 = 6 6 x 90 = 540 90 ÷ 6 = 15 15 x 90 = 1350 90 ÷ 15 = 6
3 x 5 = 15 15 x 6 = 90 Answer: 90