Các câu hỏi tương tự
co bao nhieu so co 4 chu so khac nhau ma cac chu so deu la le
cho 4 so 0;1;2;3; hoi lap duoc bao nhieu so co 4 chu so khac nhau,bao nhieu so co 3 chu so khac nhau,bao nhieu so co 2 chu so khac nhau
hay cho biet co tat ca bao nhieu chu so co 4 chu so khac nhau ma cac chu so deu le
a)Co bao nhieu so tu nhien chia het cho 4 gom 4 chu so,chu so tan cung bang 2?
b)Co bao nhieu so tu nhien co 3 chu so trong do co dung mot chu so 5?
Cau 1: Co tat ca bao nhieu so co 3 chu so ma trong moi so co duy nhat 1 chu so 5.
Cau 2: Biet rang 3n+1 va 5n+4 (n thuoc N) la hai so khong nguyen to cung nhau. Khi do UCLN cua 3n+1 va 5n+4 la bao nhieu.
Cau 3: Tim cap (x;y) nguyen am thoa man:xy+3x+2y+6=0 va lxl+lyl=5.
hay cho biet co tat ca bao nhieu so co ba chu so co ba chu so khac nhau ma cac chu so deu la chan
nho giai ra nha
a ) Co bao nhieu so tu nhien chan co 3 chu so khac nhau
b }Co bao nhieu so tu nhien co 3 chu so trong do co chua dung 1 chu so 5
c )Co bao nhieu so tu nhien co 3 chu so trong do chua dung 2 chu so 5
cho 4 chu so khac nhau hoi co the lap duoc nhieu nhat bao nhieu so co 4 chu so du mat 4 chu so da cho
co the lap nhieu nhat ... thoa man dau bai
hay cho biet co bao nhieu so co 3 chu so ma cac chu so cua nhung so do deu lon hon 4