MindProofNumber Series
Choose the next number under the intended pattern.
series-v2-003Medium
4 · 6 · 9 · 13 · 15 · 18 · ?
Get a hint
The gaps repeat in a cycle of three.
The intended answer
Repeat +2, +3, +4. After 15 + 3 = 18, add 4: the next term is 22.
A finite sequence can fit more than one rule; this is the intended pattern.
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Find the exact ID shown in a post.