tim cac chu so a,b,c biet: 0,a+a,b+ab,c=bc,b ( cac chu so khac nhau bieu dien cac chu so khac nhau)

tim gia tri lon nhat cua a-b+c biet rang a , b va c la cac so co 6 chu so va cac chu so do deu khac nhau

tim cac chu so a ,b, c,d khac nhau biet rang abc x c=dac

toan tren mang:cho a,b,c la 3 chu so khac nhau va khac0,co tong bang 4.Hay tim tong cua tat ca cac so 3 chu so khac nhau lap tu 3 chu so do.

Cho a,b,c la cac chu so khac nhau va khac 0.Tim abc biet

a. abc=11.(a+b+c)

b. abc+bca+cab lamot so chinh phuong

c. abc+bca+cab=777

tim cac so co ba chu so khac nhau abc, biet abc be hon 300 a+b+c=5

cho 3 chu so a b c khac nhau va khac 0 . Tinh tong cua cac so co 2 chu so khac nhau lap duoc  tu cac chu so biet a+b+c=8

Tim so tu nhien abc co ba chu so khac nhau,chia het cho cac so nguyen to a,b,c

Tim cac bo gom 3 chu so tu nhien a,b,c khac 0 sao cho 1/a+1/b+1/c=4/5