2021 JMPSC Sprint Problems/Problem 15
Contents
[hide]Problem
Find the last two digits of
Solution
Note that and .
.
Solution 2
By multiplying out several powers of , we can observe that the last digits are always (with the exception of where ). Also, ends with several zeros, so the answer is .
~Mathdreams
Solution 3
Therefore, the answer is
- kante314 -
See also
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