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What is the next number in the pattern: 10, 5, 15, 7.5, 22.5, 11.25, 33.75, …? A. 56 B. 16.875 C. 67.5 D. 100
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16.875
divide by two, times by three,...
It switches off between "divide by two" and then "multiply by three"....and the next one in the pattern is to divide by two, so 16.875
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