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Mathematical Puzzles and Number Sequences
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0, 1, 3, 6, 10, 15, x
AnswerClick to flip back
A
21
💡 Explanation:
The sequence follows a pattern where the difference between consecutive terms increases by 1: 0 to 1 (+1), 1 to 3 (+2), 3 to 6 (+3), 6 to 10 (+4), 10 to 15 (+5). The next difference should be 6, so 15 + 6 = 21. Option A (19) would require a difference of only 4, breaking the pattern.