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!
