Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Let 
denote the (r + 2) digit number where the first and the last digits are 7 and the remaining r digits are 5. Consider the sum S = 77 + 757 + 7557 + ...+ 
. If 
, where m and n are natural numbers less than 3000, then the value of m + n is
Text Solution
Verified by ExpertsThe correct answer is:
1219
(1219)
m= 1210
n = 9
m + n= 1219
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