Find the missing number in the series below 63, 71, ?, 93, 107
- 82
- 86
- 75
- 81
Explanation
Given series:
63, 71, ?, 93, 107
Now find the differences between known consecutive numbers:
- 71 − 63 = 8
- ? − 71 = ?
- 93 − ? = ?
- 107 − 93 = 14
Let's check a consistent pattern in differences:
- 63 → 71 (+8)
- 71 → ? (+10)
- ? → 93 (+12)
- 93 → 107 (+14)
So the pattern of differences is increasing by +2 each time:
+8, +10, +12, +14
Now, insert the missing number:
- 71 + 10 = 81
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