Multiple choice general knowledge math & puzzles

Complete the series 25,26,199,?

  1. 299

  2. 486

  3. 676

  4. 758

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The series follows 25 × n^3 ± 1 for n=1,2,3: 25×1+1=26, 25×8-1=199, 25×27+1=676. The multipliers are cubes (1, 8, 27 = 1³, 2³, 3³) and adjustments alternate (+1, -1, +1). Therefore the 4th term is 676, which is 26².