Noi nao ma co  sieu thi ma ko co hang hoa

noi nao co duong pho ma khong co xe co co sieu thi ma khong co san pham co nha cua nhung khong co nghuoi o

Mot don vi bo doi khi xep hang co 20 nguoi 25 nguoi hoac 30 nguoi deu thua 15 nguoi . neu xep moi hang 41 nguoithi vua du ( ko co hang nao thieu. Ko co ai o ngoai hang).hoi don vi co bao nhieu nguoi . biet rang so nguoi cua dom vi chua den 1000 nguoi

lam the nao nhieu nguoi tham chi 2 so chu so ma co ai o noi hang chuc

do cac cau [co 100 diem ko co 3 diem nao thang hang ma cu 2 diem thi co 1 duong thang vay co bao nhieu duong thang ] ai dung  thi to cho dung nha 

Mot don vi bo doi khi xep hang moi hang co 20 nguoi, 25 nguoi, 30 nguoi deu thua 15 nguoi . Neu xep moi hang 41 nguoi

thi vua du ( khong co hang nao thieu , khong co ai o ngoai hang) . Hoi don vi co bao nhieu nguoi, biet rang so nguoi cua don vi chua den 1000 nguoi ?

mot gia dinh gom co 3 nguoi bo , me  , 1 con  . binh quan thu nhap hang thang la 800000 dong moi nguoi neu gia dinh do co them 1 con nua ma tong thu nhap cua gia dinh ko thay doi binh quan thu nhap hang thang cua moi nguoi giam di bao nhiu

1 gia dinh gom 4 nguoi[bo, meva 2 con].Binh quan thu nhap hang thang la  1780000dong 1 nguoi.Neu tong thu nhap ko thay doi ma co them mot dua con nua thi thu nhap hang thang cua moi nguoi giam di bao nhieu?

mot gia dinh gom 3 nguoi {bo ,me va mot con}.binh quan thu nhap hang thang la 800000dong moi nguoi .neu gia dinh do co them mot con nua ma tong thu nhap cua ban ko thay doi thi binh quan thu nhap hang thang cua moi nguoi giam di bao nhieu tien?

trinh bay bai giai