52+54+56+… +200

52+54+56+… +200


(200+52)(200-52+1)/2 =18774



78+56-54+43+52=?


It's 283



The average of some natural numbers greater than 0 is 56, and one number 68 is removed,
The average of the remaining natural numbers is 55. How big is the largest of these natural numbers


The sum is s and the number is X
s/x=56
s-68/x-1=55
The solution is s = 728 x = 13
If you want to find the largest number, one is 68, the other is greater than 0, then assume that it is 1, and the largest number is 728-68-11 = 649