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1
last 2 digits of the (11 + 12 + 13 + ... + 2006)^2 (HOMC 2006 J Q1)
last 2 digits of the (11 + 12 + 13 + ... + 2006)^2 (HOMC 2006 J Q1)
Source:
July 23, 2019
number theory
Digits
Problem Statement
What is the last two digits of the number
(
11
+
12
+
13
+
.
.
.
+
2006
)
2
(11 + 12 + 13 + ... + 2006)^2
(
11
+
12
+
13
+
...
+
2006
)
2
?
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