Easy
๐Ÿ—‚ Logic
โšก 8 XP

Sequence Puzzle #289

๐Ÿ‘ฅ 2,384 solved ๐Ÿ“Š 60% solve rate ๐Ÿ˜ 40% fail rate
What number comes next in this arithmetic sequence: 9, 13, 17, 21, ...?
๐Ÿ“Š Only 60% solve this correctly
๐Ÿ‘ฅ 2,384 attempts
โšก Earn +8 XP for solving
โ“ Quick Answer & Explanation
25

The answer to this riddle is 25. Difficulty: Easy ยท Solved by 2,384 puzzle lovers.

Look at the difference between consecutive numbers: it is +4
โ† Sequence Puzzle #288 Sequence Puzzle #290 โ†’
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