Series – Sum of Special Series (Σn, Σn², Σn³)

Grade 11 Maths — Series – Sum of Special Series (Σn, Σn², Σn³): 25 practice questions with instant scoring and explanations.

1. The sum of first n natural numbers Σn = ?
2. The sum of first n squares Σn² = ?
3. The sum of first n cubes Σn³ = ?
4. Σ(n=1 to 5) n = ?
5. Σ(n=1 to 4) n² = ?
6. Σ(n=1 to 3) n³ = ?
7. 1² + 2² + 3² + 4² + 5² = ?
8. 1 + 8 + 27 + ... + 10³ = ?
9. The sum of squares of first 10 natural numbers is:
10. The sum of cubes of first 5 natural numbers is:
11. Σ(n=1 to 6) n = ?
12. Σ(n=1 to 10) n² = ?
13. 2² + 3² + 4² + 5² = ?
14. 1³ + 2³ + 3³ + 4³ = ?
15. If Σ(n=1 to N) n = 55, then N = ?
16. The formula for sum of first n odd numbers is:
17. The sum of first 8 even natural numbers is:
18. Σ(n=1 to 7) n² = ?
19. The sum of first 12 natural numbers is:
20. 1 + 4 + 9 + ... + 100 = ?
21. 2 + 4 + 6 + ... + 20 = ?
22. 1³ + 2³ + ... + 5³ = ?
23. The sum of first n natural numbers is S_n = ?
24. Using the formula, Σ(n=1 to 100) n = ?
25. Σ(n=1 to 8) n³ = ?