tim ps biet tich cua tu va mau bang 550 biet mau chua thua so nguyen to la 2va5
tim phan so bang 8/18 co tich giua tu va mau la 550 va mau cua phan so chi chua thua so nguyen to 2,5
tim phan so bang 8phan18 biet tich giua tu va mau =324
Tim ps =20/39 biet UCLN cua tu va mau la 36
tim cac phan so toi gian biet tich cua tu va mau la 220 va phan so co the viet dc duoi dang so thap phan
Tim n thuoc N biet so n co 30 uoc va khi phan tich thanh thua so nguyen to thi co dang n = 2^x × 3^y biet x+y =8
Tim n thuoc N , biet so n co 30 uoc va khi phan tich thanh thua so nguyen to thi co dang n = 2^x × 3^y biet x + y = 8
cho a la 1 hop so, khi phan tich ra thua so nguyen to chi chua hai thua so nguyen to khac nhau la P 1 va P 2. biet a^3 co tat ca 40 uoc. Hoi a ^2 co bao nhieu uoc
tim mot phan so co mau la 11 biet rang khi tu tru 18 va nhan mau voi 7 thi duoc mot phan so bang phan so da chotim mot phan so co mau la 11 biet rang khi tu tru 18 va nhan mau voi 7 thi duoc mot phan so bang phan so da cho