cho 1 so chinh phuong co 4 chu so. Biet rang chu so tan cung cua no la so nguyen to, tong cac chu so cua no cung la so chinh phuong va can bac 2 cua no co tong cac chu so cung la so chinh phuong
Tim so tu nhien n co hai chu so biet rang hai so (2n+1) va (3n+1) dong thoi la so chinh phuong.
Tim mot so chan lon nhat co 5 chu so ma 3 chu so dau giu nguyen gia tri tu trai sang phai tao thanh mot so chinh phuong va 3 chu so cuoi giu nguyen thu tu tao thanh 1 lap phuong dung
trên bảng viết 99 số :1,2,3,4,...,99. cu moi lan nguoi ta xoa di hai so bat ki , roi lai viet gia tri cua tong hai so vua xoa vao bang cuoi cung tren bang chi con lai mot so , gia su so do la k . hay tim k va chung to k khong phai la so chinh phuong
tim mot so tu nhien co hai chu so biet rang so do bang lap phuong cua so tao boi chu so hang van va chu so hang ngan cua so da cho
cho n la so tu nhien co 2 chu so.Tim n biet n+4 va 2n deu la cac so chinh phuong
Mot so A dc chia thanh 3 phan ti le nghich vs 5 , 2 , 4. Biet tong cac lap phuong cua 3 phan do la 9512. Tim A.
cho n la so tu nhien co 2 chu so.Tim n biet n+4 va 2n deu la so chinh phuong
thanks truoc nha
cmr neu tong cac lap phuong cua ba so nguyen lien tiep chia het cho 9 thi se co mot so la boi cua 3