tim 2 so tu nhien biet rang gap ca hai so do len 3 lan thi duoc 2 so co tong moi = 432 va co ti so la 1/1 tim 2 so
tim mot so tu nhien co 2 chu so, biet rang neu ta viet them chu so 0 vao giua chu so hang chuc va chu so hang don vi cua so do ta duoc so moi gap 7 lan so ban dau
tim so tu nhien co 2 chu so biet rang neu viet 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 . So can tim la
tim 2 so co tong bang 140,biet rang neu gap so hang thu nhat len 5 lan va gap so hang thu hai len 3 lan thi tong moi la 508
tim hai so co tong bang 140 biet rang neu gap so hang thu nhat len 5 lan va gap so hang thu 2 len 3 lan thi tong moi la 508
tim 2 so tu nhien co tong bang 148. Biet rang so lon gap 3 lan so be.
Tim so tu nhien co 2 chu so . Biet rang so do gap 24 lan hieu cua chu so hang chuc va hang don vi
tim hai so co tong bang 140 , biet rang neu gap so hang thu nhat len 5 lan va gap so hang thu hai len 3 lan thi tong moi la 508
Tim so tu nhien co 2 chu so biet rang
a. So do gap 6 lan tong cac chu so cua no
b. So do gap 7 lan tong cac chu so cua no
c. So do gap 8 lan tong cac chu so cua no
d. So do gap 9 lan tong cac chu so cua no