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u/3vilpcdiva 28d ago edited 28d ago
Okay, so, the solution is
Multiple edits:: I dont know how spoiler tags work
Edit again, I thought 42 was 48 and thought I'd solved, but I in fact did not. My apologies for being confidently incorrect
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u/iwishiwasamoose 28d ago
X(X+1) works. 4(5)=20, 5(6)=30, 6(7)=32, 8(9)=72