6.5-4.7 = 1.8
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Sure. 65-18=47. When you subtract 7 from that, you wind up with 40.
47 - 5 = 42 (42 is the difference).
This series is marked by the increasing difference between the numbers. The difference is 3, 6, 9, 12 and 15, making the next number 47 + 18 or 65.
450 - 65 = 385
47 - 15, D16