What comes next? 3, 8, 18, 35, 61, ?
98
Find the pattern of differences:
\(8 - 3 = 5,\ 18 - 8 = 10,\ 35 - 18 = 17,\ 61 - 35 = 26\)
Second-level differences: 10 − 5 = 5, 17 − 10 = 7, 26 − 17 = 9 (increasing by 2).
So the next first-level difference is 26 + 11 = 37.
\(\text{Next term} = 61 + 37 = 98\)
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