là 1550 chữ số, nha,mình làm bài này rồi đúng đấy
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co bao nhieu so co 5 chu so khac nhau ma chu so hang tram cua moi so do la
tim so co 3 chu so lon nhat co cac chu so khac nhau ma cac chu so hang don vi bang trung binh cong cua chu so hang tram va chu so hang chuc . tim so do
Cho 5 chu so 0 ; 1 ; 2 ; 3 ; 4 hoi tu 5 chu so da cho :
a) Co the viet duoc bao nhieu so co 4 chu so ?
b) Co the viet duoc bao nhieu so chan co 4 chu so ma chu so hang tram la 2 ?
ban an phai tim tat ca cac so co 3 chu so lon hon 500 ma tong cac chu so cua moi so do deu bang 12 dong thoi chu so hang don vi bang trung binh cong cua chu so hang tram va hyang chuc hoi ban an tim duoc nhieu nhat bao nhieu so thoa man yeu cau
Tim so co 5 chu so khac nhau chia het cho 5 va co chu so hang tram la 4
cho 5 chu so 0 ; 1 ; 2 ; 3 ; 4 hoi tu 5 chu so da cho co the viet duoc bao nhieu so chan co 4 chu so ma chu so hang tram la 2 . Nho giai thich nhe
Ban An phai tim tat ca cac so co 3 chu so lon hon 500 ma tong cac chu so cua moi so do deu = 12, dong thoi chu so hang don vi = trung cong cua chu so hang tram va hang chuc. Hoi ban An tim duoc nhieu nhat may so thoa man yeu cau?
tinh hieu cua so lon nhat co 6 chu so khac nhau va be nhat co 6 chu khac nhau
viet so be nhat co 6 chu so hang nghin la 8 chu so hang chuc la 5
tu cac chu so 1 , 2, 3, 5
a] lap duoc bao nhieu so co 4 chu so ma cac chu so trong moi so khac nhau ?
b]moi chu so xuat hien trong moi hang may lan ?
c} tinh tong cac so do theo cach hop li
ai nhanh nhat se duoc 4 like