Solved by rkdehflk

#	Title	# Solved	Avg. Tries
1000	A+B STANDARD	320,174	2.59
5597	Who have not handed in ?	66,174	1.94
10171	Cats STANDARD	183,247	2.80
10998	A×B STANDARD	229,191	1.30
25304	영수증	77,675	1.80

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