tong cua hai so 156.ba lan so thu nhat cong voi hai lan so thu hai so thu hai bang 414 so thu nhat al....
Tong cua ba so la 122. Neu lay so thu nhat chia cho so thu hai hoac lay so thu hai chia cho so thu ba deu duoc thuong la 3 va du la 1. Tim ba so ay
tong cua 3 so la 1640 so thu nhat gap 1,5 lan so thu 2 so thu ba gap 2,5 lan so thu hai tim so thu 3
Tong cua ba so bang -84.tim cac so do biet rang ti so giua so thu nhat va so thu gai la 1/2 va giua so thu hai voi so thu ba la 1)20
tong cua 3 so la 112.Neu lay so thu nhat chia cho so thu hai,hoac lay so thu hai chia cho so thu ba thi deu duoc thuong la 3 du 1.Tong cu so thu nhat va so thu ba
Cho ba so tong la 999. Neu lay so thu nhat chia cho so thu hai thi duoc thuong la 5 va du la 3. Thm ba so ay, biet rang so thu nhat lon hon tong hai so kia la 7.
tong 2 so la 200 neu tang so thu nhat len 3 lan thi so thu nhat bang 4/7 so thu hai tim hai so
cho 3 so co tong la 210, biet rang 6/7 so thu nhat bang 9/11 so thu hai va bang 2/3 so thu ba, tim so lon nhat trong ba so
mot phep cong co ba so hang co tong bang 2010 . So hang thu nhat gap doi so hang thu 2, so hang thu 3 bang hai lan tong so hang thu nhat va thu hai. Tim ba so hang cua phep cong tren