tong tat ca cac so nguyen to co dang 13a(chu y so tren la so co dang 13a chu khong phai 13 nhan a)
Tong cua cac so nguyen duong lon nhat co hai chu so voi so nguyen am nho nhat co ba chu so la
Tong cua cac so nguyen duong lon nhat co hai chu so voi so nguyen am nho nhat co ba chu so la
Tinh tong A + B biet rang A la tong cac so nguyen am le 2 chu so B la tong cac so nguyen duong chan co 2 chu so
tong cua so nguyen am lon nhat co 3 chu so voi so nguyen am lon nhat co 2 chu so giong nhau la
cho tong A=(x+y+z)-(t+h)
trong do x,y,z,t,h la cac so nguyen khac nhau tu 1 den 2009.tim gia tri lon nhat va nho nhat
tim tat ca cac so nguyen duong x,y sao cho cac so x2+3.y va y2+3.x deu la so chinh phuong cua 1 so
tong cua so nguyen am lon nhat co ba chu so voi so nguyen am lon nhat co hai chu so giong nhau la
Tong cua so nguyen am lon nhat co ba chu so voi so nguyen am lon nhat co hai chu so giong nhau la.
