Bon ban chung tien mua mot qua bong. Hai gop mot nua so tien mua bong. So tien cua Binh gop ban 1/3 toan bo so tien gop  cua cac  ban khac. So tien cua Giang gop bang 1/4 so tien cua cac ban khac. Duong gop 2500 dong thi vua du so tien mua bong . Hoi bon ban da mua qua bong bao nhieu dong ?

mot bong den lu sang binh thuong co dien tro R=18\(\Omega\) va cuong do dong dien chay qua no la 0,9 A tinh cuong do dong dien chay qua day toc bong den khi ta dat vao hai cuc cua bong den mot hieu dien the 27V khi do do sang cua bong thay doi the nao so voi ban dau

em co 50 qua bong,anh co so qua bong gap 6 lan so qua bong cua em.HOI anh co bao nhieu qua bong?

anh co 90 qua bong bay,em co so qua bong bay it hon cua anh la 10 qua.Hoi em co bao nhieu qua bong bay?

ha gap duoc 36 bong hoa, tri gap duoc 27 bong hoa, tu gap duoc so hoa lon hon so trung binh cong cua ca 3 ban 5 bong hoa. Hoi tu gao duoc bao nhieu bong hoa. Ai nhanh ma dung thi minh cho

3 binh hoa thi co 15 bong hoa.Hoi 5 binh hoa thi co bao nhieu bong hoa ?

tuoi trung binh cua cac cau thu doi bong chuyen co ̉nguoi la 21 tuoi . neu khong ke doi truong thi trung binh cua 5 cau thu con lai la 20 tuoi .hoi doi truong bao nhieu tuoi ?

ba ban An,Binh,Cuong gop tien mua mot qua bong . An gop 1/4 so tien,Binh gop nhieu hon An 1/12 so tien. tinh ra An gop it hon Cuong 10 000 dong . hoi qua bong do co gia bao nhieu tien va moi ban gop bao nhieu tien ?

tuoi chung binh cua 6 cau thu bong chuyen la 17 tuoi neu khong ke doi chuong thi tuoi chung binh cua cac cau thu con lai la 16 tuoi hoi doi chuong bao nhieu tuoi