neu viet them chu so 2 vao ben trai so do ta duoc so moi hon so cu 200 don vi
ta co so do:
so moi:6 phan
so CT: 1 phan
so can tim la: 200: (6-1)=40
DS:40
tim mot so tu nhien co 5 chu so biet rang khi viet them chu so 6 vao ben trai so do thi duoc so moi gap 9 lan
tim so tu nhien co 2 chu so ,biet rang neu viet them chu so 0 xen giua chu so hang chuc va hang don vi cua so do ta duoc so moi gap 10 lan so can tim .Neu viet them chu so 1 vao ben trai so vua nhan duoc thi so do gap len 3 lan.
tim mot so tu nhien co 5 chu so biet rang khii viet them chu so 6 vao truoc so do (ben trai) thi duoc so moi gap 9 lan
tim so co 3 chu so,biet rang khi viet them chu so 1 vao ben trai so do thi duoc so co 4 chu so gap 9 lan so phai tim
Tìm so co hai chu so biet rang neu ta viet them chu so 2 vao ben trai va ben phai so do ta duoc so moi gap 36 lan so phai tim.
Tim so co 3 chu so,biet rang khi viet them chu so 2 vao ben trai so do thi so do se tang gap 9 lan.
biet bai nao giai ho bai y
1tim mot so co 2 chu so biet rang so do gap 5 lan tong chu cac so cua no
tim so co 3 chu chu so biet rang them chu so 5 vao ben phai so do thi so do tang them 1112dv
tim mot so tu nhien co 2 chu so biet rang them chu so 9 vao ben trai so do thi duoc mot so gap 13 lan so da cho
tim 1 so co 2 chu so biet rang neu viet them chu so 12 vao ben trai so do ta duoc 1 so gap 26 lan so can tim
tim 1 so tu nhien co 3 chu so biet rang khi viet them chu so 9 vao ben trai so do ta duoc 1 so gap 26 lan so can tim
