100 hs, co 75 hs thich toan, 60 hs thich van.Hoi

a) co bao nhieu hs thich ca van va toan (gia su ban nao cung phai thich mot mon)

b) neu 18 hs ko thich mon gi thi co bao nhieu hs thich ca van lan toan

co 4 ban cung thi giai toan nhu sau. moi nguoi phai giai 4 bai toan .neu giai dung 1 bai thi duoc 2 diem ,con neu sai mot bai thi tru 2 diem . neu so diem bi tru bang hoac lon honso diem dat thi coi nhu la 0. trong cuoc thi nay chac chan it nhat co 2 ban cung diem . em giai thich dieu do ? nhanh len, minh can gap

co 24 xe moi xe cho 12 chuyen thi het so hang . hoi neu huy dong 18 xe thi phai cho moi xe tang them bao nhieu chuyen

Mot don vi van tai duoc giao chuyen 1khoi luong hang .neu huy dong 24 xe thi moi xe cho 12 chuyen het hang? Neu huy dong 18 xe cung loai thi moi xe phai cho tang them bao nhieu chuyen ?

GIAP MIK VOI , MOI NGUOI OI

MIK HOC LOP 4 , NGAY MAI CO MON TAP LAM VAN MINH PHAI NGHI OM NEN KHONG BIET VIET CAI GI. BAN NAO HOC LOP 4 NHU MIK THI CHI RA LA VIET NHU THE NAO , TRANG BAO NHIEU , DE BAI LA GI , NEU CO GOI Y THI VIET RA GIUP MIK NHE , NGAY MAI MIK PHAI DEN TRUONG ROI HUHU .  EM XIN OLM DUA LEN MUC GIUP TOI GIAI TOAN GIUP EM NHE

1 don vi van tai duoc giao chuyen 1 so hang len vung cao . neu huy dong 18 xe thi moi xe cho 24 chuyen se het hang do . neu huy dong 12 xe cung loai thi moi xe phai cho tang them bao nhieu chuyen

Biet rang,14 nguoi xay xong tuong rao quanh truong phai mat 10 ngay.Nay nha truong muon xay xong trong 6 ngay thi can bao nhieu nguoi lam?

Bai toan nay co phai in sai khong ,neu khong thi giai giup minh nhe!

Mot met khoi dat nang 1.75 tan .Muon dao mot cai be ngam hinh hop chu nhat sau 3m, ronh 9m, dai 12m thi phai dao bao nhieu tan dat .Neu dung xe chuyen cho dat ay thi phai mat bao nhieu chuyen xe ? (Biet rang moi chuyen xe cho duoc )

tim 3 so thap phan A,B va C co tong la 200,4921.Neu chuyen dau phay cua so A sang ben trai 2 chu so thi duoc so B, neu chuyen dau phay cua so A sang ben phai mot hang thi duoc so C.