유튜브 검색 = 함수바라기 vlookup hlookup index match choose weekday sum mod round roundup rounddown trunc average max min large small count counta rank if and or sumif averageif countif sumifs averageifs countifs dsum daverage dmax dmin dcount left mid right concatenate today now date time year month day hour minute second 이것만 외우셔도 3-4문제는 맞을 거고, 사실 5문제 다 푸실 확률도 높아요~