Five marks example problems I — task. Mathematics State Board, Class 10.

PDF chapter test TRY NOW

1. Find the sum of:

(i) \(1^2 + 2^2 + … + 19^2\) \(=\)

(ii)

5^{2} + 10^{2} + 15^{2} + ... + 105^{2}

\(=\)

(iii)

15^{2} + 16^{2} + 17^{2} + ... + 28^{2}

\(=\)

2. Find the sum of:

(i) \(1^3 + 2^3 + … + 16^3\) \(=\)

(ii) \(9^3 + 10^3 + … + 21^3\) \(=\)

3. If \(1 + 2 + 3 + … + n = 666\), then find \(n\).

Answer:

The value of \(n\) \(=\)

Did you find an error?

4. Five marks example problems I