tim phan so lon nhat sao cho khi chia cac phan so 28/15; 21/10; 49/84 cho no ta deu duoc ket qua la mot so tu nhien
tim phan so lon nhat sao cho khi chia cac phan so 28/15 , 21/10 , 49/84
tim phan so nho nhat khac 0 sao cho khi chia no cho 14/9 , cho 45/27 ta deu duoc thuong la cac so tu nhien
tim phan so co gia tri nho nhat ma tu va mau la cac so tu nhien sao cho khi nhan phan so nay lan luot voi cac phan so 2\3,4\5,6/7 thi moi tich tim duoc deu la cac so tu nhien
tim p/s lon nhat sao cho khi chia cac p/s 28/15;21/10;49/84 cho no ta deu duoc thuong la so tu nhien
Tim phan so lon nhat,khi chia cac phan so 24/7 va 18/11 cho no ta deu duoc cac thuong la so nguyen
tim phan so a/b lon nhat dekhi chia cho cac phan so 2phan 5,3phan7, 4phan 9cho a phan b thi duoc thuong la cac so tu nhien
tim phan so toi gian nho nhat co tu va mau la cac so tu nhien sao cho khi nhan phan so do lan luot voi cac phan so 10/7;5/6;15/9 thi moi tich tim duoc la so tu nhien.
cho 2 P/S 5/12 ;9/32
tim phan so lon nhat sao cho khi chia moi so cho phan so da cho phan so a/b thi ket qua la 1 so tu nhien