tui a co chua mot so hat dau gap 2 lan so voi so hat dau chua o tui b nguoi ta chuyen 12% so hat dau o tui a va 20% so hat dau o tui c vi the tui c co 488 hat dau va so hat dau cua tui c tang len 22% hoi luc dau tui a co bao nhieu hay dau
2 kho chua 1450 tan ca phe hat. Nguoi ta chuyen tu kho 1 sang kh 2 110 tan ca phe va so luongn ca phe cua hai kho se bang nhau. Hoi luc dau moi kho co bao nhieu tan ca phe hat
luc dau so bi o tui trai nhieu hon so bi o tui phai la 10 vien.Sau do ban binh da lay 5 vien o tui phai cho sang tui trai thi thay so bi o tui phai bang 3/5 so bi o tui trai.Hoi luc dau moi tui co bao nhieu vien
co hai can dau chua tat ca 160l dau. neu chuyen 20 l o can thu nhat sang can thu 2 thi so dau trong can thu 2 gap 3 lan so dau trong can thu nhat. vay luc dau can thu nhat co bao nhieu lit dau?
CAU 1; CHO 2 SO DEU CO 2 CHU SO,TONG CUA 2 CHU SO BANG 46.NEU GHEP SO BE VAO BEN PHAI,HOAC GHEP SO BE VAO BEN TRAI SO LON THI DUOC 2 SO DEU CO 4 CHU SO;HIEU CUA HAI SO NAY BANG 2178.TIM 2 SO DA CHO?
CAU 2;TIM 4 SO CO TRUNG BINH CONG LON HON SO THU NHAT LA 98 BE HON SO THU HAI LA 7,BANG NUA SO THU BA VA GAP DOI SO THU TU.
CAU 3; HINH TAM GIAC ABC CO CHIEU CAO AH.TREN AH LAY M SAO CHO MH=1/3 AH.NOI M VOI B,BH=6,4 CM;HC=7,2 CM.TINH DIEN TICH HINH TAM GIAC ABC,BIET DIEN TICH HINH TAM GIA BMH LA 11,2 CM VUONG.
CAU 4;CHO DAY SO ....64;81;100;121;144.TIM SO HANG DAU TIEN CUA DAY SO BIET DAY SO CO MUOI SO HANG.
CAU 5;NGUOI TA MUA MOT BAO MI CHINH CAN NANG 50 KG VAO CAC TUI NHO .MOI TUI DUONG 450 GAM THI THIEU 11 TUI VA THUA 50 GAM.HOI NEU CHIA VAO MOI TUI 800GAM THI CO THUA BAO NHIEU TUI.
CAU 6;1 NGUOI BAN HOA QUA,NGAY DAU BAN DUOC 20 KG.BIET SO HOA QUA NGAY DAU BAN DUOC BANG 80% CUA NGAY THU HAI ,SO HOA QUA CUA NGAY THU HAI BANG 125% CUA NGAY THU BA VA BANG 80% CUA NGAY THU 4.HOI TRONG 4 NGAY BAN DUOC BAO NHIEU KG?
luc dau ti so cua so nguoi o doi 1va doi 2 la 2/5 sau do nguoi ta bo sung them 5 nguoi o doi 1 va doi 2 luc nay so nguoi o doi 2 gap 2 lan so nguoi o doi 1.Hoi luc dau moi doi co bao nhieu nguoi
tong so bi 2 tui la 160 vien.Biet neu chuyen 1/5 so bi tu tui trai sang tui phai thi so bi 2 tui = nhau.tim ti so phan tram cua tui trai so voi tui phai luc dau
luc dau thung thu nhat co nhieu hon thung thu hai la 5 lit dau . nguoi ta da ban di 10 lit dau o thung thu hai va 5 lit dau o thung thu nhat , luc nay so lit dau o thung thu hai bang 3/5 so lit dau o thung thu nhat . hoi luc dau moi thung co bao nhieu lit dau?
Mot tui gao co 12,5kg.Nguoi dau bep muon lay ra 4kg chi bang mot chiec can thang bang va mot qua can 1kg,mot qua can 0,5kg.Hoi nguoi dau bep phai can nhu the nao de sau 2 lan can lay ra duoc so gao do ?