Easy
๐Ÿ—‚ Logic
โšก 8 XP

Sequence Puzzle #65

๐Ÿ‘ฅ 4,349 solved ๐Ÿ“Š 90% solve rate ๐Ÿ˜ 10% fail rate
What number comes next in this arithmetic sequence: 5, 9, 13, 17, ...?
๐Ÿ“Š Only 90% solve this correctly
๐Ÿ‘ฅ 4,349 attempts
โšก Earn +8 XP for solving
โ“ Quick Answer & Explanation
21

The answer to this riddle is 21. Difficulty: Easy ยท Solved by 4,349 puzzle lovers.

Look at the difference between consecutive numbers: it is +4
โ† Sequence Puzzle #64 Sequence Puzzle #66 โ†’
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