tim so tu nhien co 2 chu so biet rang neu viet chinh so do xen vao giua hai chu so cua no thi so do tang len 99 lan
tim so tu nhien co 2 chu so biet rang neu viet chinh so do xen vao giua hai chu so cua no thi so do tang len 9 lan
tim so co 5 chu so biet so do bang binh phuong cua tong cac chu so cua so do
tim phan so co cac tinh chat sau
a)Tu so cua phan so la so tu nhien co mot chu so
b)Hieu giua tu so va mau so bang 4
tim hai so tu nhien co hai chu so biet tong hai chu so do bang 10 va neu viet theo thu tu nguoc lai thu duoc so moi kem so phai tim 54 don vi
tim phan so co dong thoi cac tinh chat sau
a/Tu cua phan so la so tu nhien co mot chu so
b/Hieu giua tu so va mau so la 4
c/Neu giu nguyen tu so va viet them vao ben phai mau so mot chu so dung bang tu so,thi duoc phan so moi bang phan so 1/5
tim mot so tu nhien co tong hai so bang 47 va hieu cua hai so do la 23
co ban nao giai thich cho minh hieu tim gia tri nho nhat cua dai so lop 8 la gi ko
1.gia tri cua x3+y3-9x-54=0
2.tu 0 den 6 co the viet duoc bao nhieu chu so tu nhien co 2 chu so khac nhau
