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Recent Problems

IDDescription / TitleSolved By
717Summation of a Modular Formula
181
716Grid Graphs
135
715Sextuplet Norms
103
714Duodigits
322
713TurĂ¡n's water heating system
311
712Exponent Difference
263
711Binary Blackboard
214
710One Million Members
334
709Even Stevens
334
708Twos are all you need
187