1.Co bn so co 3 chu so chia het cho 2 ma ko chia het cho 3

2.Viet so tu nhien lon nhat co 4 chu so ma tong 4 chu so bang tich 4 chu so

3.Viet so tu nhien lon nhat co 5 chu so ma su dung 3 chu so khac nhau

4.Tinh tong tat ca cac so co 4 chu so chia het cho 2 va 3

5.Co bn so co 4 chu so ma tich 4 chu so do bang 12

Cac ban giai giup minh nha ,minh dang can gap

Cau 1 co tat ca ..... so co 2 chu so ma hieu 2 chu so cua moi so do bang 6

Cau 2 so lon nhat co 2 chu so ma hieu 2 chu so cua moi so do bang 5 . La :.............

Cau 3 so be nhat co 2 chu so ma tong 2 chu so cua moi so do bang 9 . La : .............

so lon nhat co cac chu so khac nhau chia het cho 5 ma tich cac chu so bang 30

Tim mot so neu lay so do tru di so lon nhat co bon chu so va co tong cac chu so bang 30  thi duoc so be nhat co 5 chu so

so tu nhien lon nhat co cac chu so khac nhau ma co tich cac chu so bang 120

so lon nhat co 5 chu so tich bang 45 

hai so co tong bang so lon nhat co hai chu so so va hieu bang tich 2 chu so cua so lon nhat co hai chu so do hai so do la

so lon nhat co 3 chu so ma tich cua 3 chu so do bang 60

Tong cua bon so tu nhien la so lon nhat co bay chu so. Neu xoa di chu so hang don vi cua so thu nhat thi duoc so thu hai. So thu ba bang hieu cua so thu nhat va so thu hai. So thu nhat la tich cua so be nhat co ba chu so va so lon nhat co bon chu so. Tim so thu tu.