2018 Science Olympics Problems

My Questions for the 2018 CCVI Science Olympics

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Overview
After graduating high school, I was asked by my programming teacher to help out by creating problems for the high school's programming contest.
This contest is primarily grade 11 students who have only taken 1 programming course and have very little experience. It is a group programming contest, with teams being made of 4 members, but there is only 1 computer.
The questions are based off Project Euler or CCC questions.

Solutions
Problem Solution Data file
1 p1.java p1.txt
2 p2.java p2.txt
3 p3.java p3.txt
4 p4.java p4.txt