Multiple choice

Choose the correct alternative from the given ones that will complete the series. $4117 , 5128 , 6159 , 7170 , \dots$

  1. $7138$
  2. $7659$
  3. $8191$
  4. $8179$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Each digit position follows a pattern. First digit: 4,5,6,7 → next is 8 (add 1). Second digit: 1,2,5,7 → pattern is adding consecutive odd numbers (1+1=2, 2+3=5, 5+2=7? No wait). Let me recalculate: 1→2 (+1), 2→5 (+3), 5→7 (+2), so 7→9 (+2). Third digit: 1→8 (+7), 8→9 (+1), 9→0 (+1 mod10), so 0→1 (+1). Fourth digit: 7→8 (+1), 8→9 (+1), 9→0 (+1 mod10), so 0→1 (+1). Therefore: 8191.

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