+0  
 
+1
56
1
avatar+154 

Find the modulo 7 remainder of the sum 1+3+5+7...+197+199

Creeperhissboom  Apr 17, 2018
Sort: 

1+0 Answers

 #1
avatar
+2

Find the modulo 7 remainder of the sum 1+3+5+7...+197+199

 

N = [199 -1] / 2 + 1 = 100 terms

S =[F + L] / 2 x N

S =[1 + 199] / 2 x 100 =10,000

Or: N^2 =100^2 =10,000

10,000 mod 7 = 4

Guest Apr 17, 2018
edited by Guest  Apr 17, 2018

26 Online Users

avatar
avatar
New Privacy Policy (May 2018)
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  Privacy Policy