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In this series, what number comes next? 90, 85, 75, 60, 40 . . .

User Charnel
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For step one from 90 to 85, you are decreasing by 5. Then from step two, you are decreasing 85-75 which is 10 (which is 5*2). Step three is 75-60 = decrease of 15 (which. Is 5*3), and step four is a decrease of 60-40=20 (which is 5*4).

Therefore, the next number in the series would be step 5, and so 40-(5*5) gives the value, following the rule.

40-25= 15


The next number in the series is 15! :))
User NinaNa
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