ch day cac chu so tu nhien lien tiep tu 145 den 245.Hoi day so tren co bao nhieu chu so hang tram la 2?
cho day so 10,15,20,25,...hoi so 2015 la so hang thu bao nhieu cua day?
thung 1 co 24 goi. thung 2 it hon thung 1 8 goi. thung 3 nhieu hon trung binh cong cua 3 thung la 8 goi. hoi thung thu 3 co bao nhieu goi?
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mot doi trong cay, moi ban man trong 4 cay.moi ban nu trong 3 cay. doi do trong duoc 147 cay. hoi co bao nhieu ban nu?
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co bao nhieu so co 3 chu so ma tong cua hang tram va hang chuc bang chu so hang don vi?
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tim 4 so tu nhien lien tiep, biet so dung truoc kem so dung sau 15 don vi . tinh tong cua 4 so
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giup minh nhe cac ban!
co bao nhieu so co 5 chu so khac nhau ma chu so hang tram cua moi so do la chu so 5
co bao nhieu so co 5 chu so khac nhau ma chu so hang tram cua moi so do la
Bai 1: cho day so 1,5,9,13,...
a) chu so thu 135 la chu so nao
b) tinh tong 200 so hang dau tien cua day
bai 2: 1/3,11/3,7,31/3,...
a) xac dinh so hang thu 2009 cua day da cho
b) trong 2009 so hang dau tien cua day co ? so tu nhien tinh tong tat ca cac so tu nhien do
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
cho day so 1,2,3,4 cho den 192
day so co bao nhieu so hang
day so co bao nhieu chu so
cho day so : 1,2,3,4,...,1998,1999,2000. Tim chu so thu 2900 cua day so