Numbers-Data Intensity 2 Questions and Answers Discussion Page.

Answer: Option B

Explanation:

(11² + 12² + 13² + ... + 20²) = (1² + 2² + 3² + ... + 20²) - (1² + 2² + 3² + ... + 10²)

	Ref: (1² + 2² + 3² + ... + n²) =	1	n(n + 1)(2n + 1)
		6

=		20 x 21 x 41	-	10 x 11 x 21
		6		6

= (2870 - 385)

= 2485.

Tutorial Link:

Published by:Michael Daani

PakMCQs.net

Computer Science Civil Engineering

Networking Electronics Database

Model Papers FPSC Papers