Gọi số đó là ab
có ab5-ab=230
10ab+5-ab=230
ab[10-1]+5=230
9ab=230-5
9a=225
ab=25
Gọi số đó là ab
có ab5-ab=230
10ab+5-ab=230
ab[10-1]+5=230
9ab=230-5
9a=225
ab=25
Tim 1 so co hai chu so , biet neu them chu so 5 vao ben phai so phai tim ta duoc 1 so moi lon hon so phai tim 230 don vi
Tim môt sô co 4 chu so biet rang neu viet them chu so 6 vao ben phai so do thi duoc so moi lon hon so phai tim 1 7 6 1 don vi
tim so co 3 chu so biet rang khi viet them chu so 7 vao ben phai so do ta duoc so be hon khi viet them chu so 7 vao ben trai la 5778 don vi
tim so co 4 chu so, biet rang khi viet them chu so 5vao ben phai so do ta duoc so lon gap 5 lan so nhan duoc khi ta viet them chu so 1 vao ben trai so do
tim mot so co hai chu so biet rang neu viet them chu do 6 vao ben phai so do ta duoc so moi hon so phai tim la 132 don vi
tim mot so co hai chu so biet rang khi viet them chu so 5 vao ben phai so do ta duoc so moi ho so cu la 230 don vi
tim 1 so biet rang neu viet them vao ben phai so do 1 so co 2 chu so thi duoc so moi lon hon so phai tim la 197406
Tim 1 so biet rang neu viet them chu so 0 vao ben phai so do thi duoc so moi lon hon so phai tim la 6417 don vi
tim 1 so biet rang neu viet them vao ben phai so do mot so co 2 chu so thi ta duoc so moi lon hon so can tim la 4554 so viet them la so nao
