Find the next number in the series: 1, 5, 14, 30, 55, ?
- A. 91 ✓
- B. 88
- C. 85
- D. 95
Correct answer
A. 91
Explanation
Each term is the sum of consecutive squares (1, 1+4, 1+4+9, 1+4+9+16, 1+4+9+16+25), so the next term adds 36: 55 + 36 = 91.
A. 91
Each term is the sum of consecutive squares (1, 1+4, 1+4+9, 1+4+9+16, 1+4+9+16+25), so the next term adds 36: 55 + 36 = 91.