App Logo

No.1 PSC Learning App

1M+ Downloads
Find the value of 1²+2²+3²+.....+10²

A425

B325

C385

D400

Answer:

C. 385

Read Explanation:

Sum of squares of first 'n natural numbers =[n(n+1) (2n+1) /6] = 10 (10+1) (2 x10+1) / 6 = (10 x 11 x 21) / 6 = 385


Related Questions:

ഷാജി ഒരു നോവലിന്റെ 2/9 ഭാഗം ശനിയാഴ്ച വായിച്ചു. 1/3 ഭാഗം ഞായറാഴ്ചയും വായിച്ചു. ബാക്കിയുള്ള 160 പേജ് തിങ്കളാഴ്ചയും വായിച്ചു. നോവലിൽ എത്ര പേജ് ഉണ്ട്?
The smallest natural number that must be added to 1212 to make it a perfect square is:
Which of the following pairs of numbers is co-prime?
After distributing the sweets equally among 25 children, 8 sweets remain. Had the number of children been 28, 22 sweets would have been left after equal distribution what was the total number of sweets.
Find the number of zeros at the right end of 100! + 200!