Co hai hop keo , hop thu 1 co 12 cai keo , neu hop thu 2 co them 20 cai keo nua thi hop thu 2 se co gap 3 lan hop thu nhat .Hoi luc dau hop thu 2 hon hop thu 1 bao nhieu cai keo ?
anh co mot so keo neu cho em 20 cai thi anh con so keo la so nhan voi 2 thi bang 100. HOI luc dau anh co bao nhieu cai keo?
co 5 hop keodung so keo bang nhau .
neu lay ra moi hop 24cai thi so keo con lai trong cac hop bang so keo co trong 3 hop luc dau .Hoi moi hop luc dau co bao nhieu cai keo?
anh co 48 cai keo,anh cho em 6 so keo do va 1 cai thi luc nay hai anh em co so keo bang nhau. Hoi luc dau em co bao nhieu cai keo ?
co 10 cai keo,nguoi ta lay ra o moi goi 8cai keo thi thay rang so keo con laidung bang so keo cua 8 goi nguyen.hoi moi goi nguyen co bao nhieu cai keo
co giao mua 1 so but chi. neu co chia deu cho tat ca hoc sinh trong lop moi ban 2 cai thi co con thua 38cai. neu co chia them cho moi ban 1 cai nua thi co van thua 3 cai. hoi co bao nhieu cay but chi ?
bo co 5 cai keo con co 8 cai keo me co 6 cai keo biet tong so keo cua ca gia dinh bang 1/3 so keo cua nguoi ban keo va nguoi ban keo co so keo bang 2/3 so keo cua nguoi ban keo truoc hoi nguoi ban keo truoc co bao nhieu cai keo
Co 6 goi keo, so keo trong moi goi nhu nhau.Ban Mai lay ra o moi goi 10 cai keo thi thay so keocon laio 6 goi bang dung so keo o bon goi nguyen. Hoi moi goi co bao nhieu cai ke
Co 1356 cai keo chia deu vao 2 hop .Hoi 5 hop nhu the thi dung duoc bao nhieu cai keo ?