+0  
 
-1
99
1
avatar+161 

Find the modulo 7 remainder of the sum \(1+3+5+7+9+\dots+195+197+199\)

 Feb 4, 2021
 #1
avatar
0

1 + 3 + 5 + ... + 199 = 199*200/2 = 19900 = 6 (mod 7).

 

The answer is 6.

 Feb 4, 2021

27 Online Users

avatar
avatar
avatar
avatar
avatar