0
Anonymous
44
[-18-26 = -44]
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35. The difference between successive terms increases by 1: 5 + 6 = 11 11 + 7 = 18 18 + 8 = 26 ⇒ 26 + 9 = 35
(-26)-(-18) = -8
The difference between -18 and 68 is 86.
26
18.