MathDB
Problems
Contests
National and Regional Contests
USA Contests
USA - Middle School Tournaments
LMT
2023 LMT Fall
14
2023 Fall LMT Team #14 sum i gcd(i ,100).
2023 Fall LMT Team #14 sum i gcd(i ,100).
Source:
February 4, 2024
number theory
Problem Statement
Find
∑
i
=
1
100
i
gcd
(
i
,
100
)
.
\sum^{100}_{i=1}i \gcd(i ,100).
i
=
1
∑
100
i
g
cd
(
i
,
100
)
.
Back to Problems
View on AoPS