2118*:9.ta tim duoc *=6.tinh bang 21186
Neu tang them 5 don vi vao thua so thu nhat thi tich moi la 595. Tim 2 thua so biet tich cua chung bang 420.
tim 2 so hieu cua chung bang 126 va biet so thu nhat nhan 3 so thu 2 nhan 2 thi duoc hai tich co ket qua bang nhau
so lon nhat trong 3 so phai tim lon hon so be nhat la 2,4 . neu nhan 1 so trong 3 so voi 12 , so kia voi 15 va so con lai voi 10 thi tich thu duoc deu bang nhau. tim cac so do
cho 3 so co tong la 210, biet rang 6/7 so thu nhat bang 9/11 so thu hai va bang 2/3 so thu ba, tim so lon nhat trong ba so
tich cua 2 phan so la 2/5. Neu ta them vao thua so thu hai 3 don vi thi duoc tich la 28/15. tim 2 phan so do?
Co bon thua ruong duoc 900 kg thoc . So thoc thu hoach othua ruong thu nhat , thu hai , thu balan luot bang \(\frac{1}{6}\); \(\frac{1}{4}\);15% tong so thu hoach bon thua ruong . Tinh so thoc thu hoach o thua ruong thu tu?
so thu nhat bang 4/3 so thu 2 them 60 vao so thu hai thi so thu nhat bang 10/9 so thu hai tim hai so luc dau
1) Tim so tu nhien nho nhat chia het cho 1 ; 2 ; 3 ; 4 ; 5 ; 6 ; 7 ; 8 ; 9
2) Phan tich cac so sau ra thua so nguyen to : 111 ; 1 111 ; 11 111 ; 111 111 ; 1 111 111 ?