Tim gia tri lon nhat cua so tu nhien a thoa man 2/3 so tu nhien nho nhat 4 . Tim so a36b biet so do co 4 chu ao khi chia cho 2, 5 va 9 dau du 1

hai so nguyen duong x,y co tong la 51

a tim gia tri lon nhat cua x.y

b tim gia tri nho nhat cua tich x,y, biet rang x va y deu lon hon 1

chia 10 so sau: 2;3;4;5;7;8;9;10;12;14 thanh 2 nhom roi lay tich cac so trong moi nhom. goi A la tong cua hai tich do. tim gia tri nho nhat cua A va chi ra it nhat 4 cach chia sao cho A nho nhat do.

tim so tu nhien nho nhat co 3 chu so voi so tuy nhien lon nhat co 2 gia tri 

viet so 2007 thanh tong cua k so tu nhien deu la hop so tim gia tri lon nhat cua k

tim n so tu nhien n nho nhat de A=5n-7/9 co gia tri duong nho nhat

tim so tu nhien n nho nhat de B=3/7n-27 co gia tri duong lon nhat

tim gia tri lon nhat cua bieu thua a-b,biet a va b la so co 2 chu so

tong cua hai so la so lon nhat co bon chu so biet mot so hang cua tong la so nho nhat co ba chu so tim so hang con lai

cho 3 so tu  nhien biet trung binh cong cua 2 trong 3 so lan luot co gia tri la 189,200,204 tim so lon nhat trong 3 so do