20142013/20142012 = 20142012/20142011 nha Trương Phạm Bình An
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Tong cua 4 so tu nhien la so lon nhat co hai chu so .Neu xoa di chu so o hang don vi cua so thu nhat thi duoc so thu hai .So thu ba = hieu cua so thu nhat va so thu hai .So thu nhat la tich cua so be nhat co ba chu so va so co bon chu so .Tim so thu tu .
Tong cua bon so tu nhien la so lon nhat co bay chu so. Neu xoa di chu so hang don vi cua so thu nhat thi duoc so thu hai. So thu ba bang hieu cua so thu nhat va so thu hai. So thu nhat la tich cua so be nhat co ba chu so va so lon nhat co bon chu so. Tim so thu tu.
Tong 4 so la 2192 xoa chu so hang don vi so 1 ta duoc so 2 xoa chu so hang don vi so 2 ta duoc so 3 xoa chu so hang don vi so 3 ta duoc so 4 ,tim so thu nhat
tong cua 2 so bang so lon nhat co 4 chu so. ti so giua hai so lon va so be bang so nho nhat co 2 chu so .tim hai so do
so be bang 1/5 so lon neu them 1 chu so 3 vao ben trai so be ta duoc so lon biet so be la so co hao chu so . Tim hai so do
cho 1 so co 2 chu so va 1 so co 3 chu so .ti so cua 2 so do la 3/7.Tim 2 so do,biet rang neu viet them chu so 1 va ben phai so be thi duoc so lon
cho mot so co hai chu so neu viet them hai chu so vao ben phai so do ta duoc mot so gap 103 lan so ban dau .tim so ban dau va so moi viet them.biet rang so ban dau co chu so hang chuc gap 3lan chu so hang don vi
trung binh cong cua 3 so la 369. biet trong 3 so do co 1 so co 3 chu so,so co 1 so co 2 chu so , 1 co 1 chu so. tim 3 so do
Cho 1 so co ba chu so . Gach bo chu so hang tram ta duoc so co 2 chu so ma nhan so nay voi 7 ta duoc so co 3 chu so da cho . Tim so do