Question

1, 5, 14, 30, 55,........?

• A. 5
• B. 50
• C. 55
• D. 91

Answer 1

Answer:

D. 91

1 =1² 5 = 1²+2² 14 =1² + 2²+3² 30=1² + 2² + 3² + 4² 55 =1² + 2² + 3² + 4² + 5² 1² + 2² + 3² + 4² + 5² + 6² = 91