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Earn +20 ptsQ: What is the mean of 87 81 80 90 87 75?
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What are the multiples of 3 that are greater than 80 and less than 90?
81 84 87
What are the multiples of 3 greater than 80 and less than 90?
81, 84, 87.
What is 85 plus 78 plus 80 plus 87 plus 93 plus 90 plus 84 plus 87 plus 81?
765
What is the mean of 93 84 80 91 94 90 78 93 80?
87
What is the next number is this series 888785817357?
Assuming that series is 88, 87, 85, 81, 73, 57 the next number is 25. The difference each time is twice the previous difference: 88 → 87 : 88 - 87 = 1 87 → 85 : 87 - 85 = 2 = 1 x 2 85 → 81 : 85 - 81 = 4 = 2 x 2 81 → 73 : 81 - 73 = 8 = 4 x 2 73 → 57 : 73 - 75 = 16 = 8 x 2 → next difference is 16 x 2 = 32 → next number is 57 - 32 = 25
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