tim so co 2 chu so biet rang neu viet cac chu so theo thu tu nguoc lai ta dc so moi ma tong cua so moi va so phai tim la 77

tim so co 3 chu so biet rang neu viet cac chu so theo thu tu  nguoc lai ta dc so moi hon dc so phai tim la 792dvva tong cua 3 chu sol bamg 10

Cho so chan co 4 chu so ma tong cac chu so cua no bang 24 . Neu viet so do theo thu tu nguoc lai thi van duoc so da cho . Hay tim so da cho , biet rang nhom 2 chu so ben trai lon hon nhom 2 chu so ben phai la  36 don vi .

tim mot so tu nhien co hai chu so, biet rang neu viet cac chu so cua so ay theo thu tu nguoc lai thi duoc so moi, lay so moi chia cho so ban dau thi duoc thuong la 3 du 13 

tim so tu nhien co hai chu so thoa man ba dieu kien sau.tong cac chu so cua no khong nho hon 7 tong binh phuong cac chu so khong lon hon 30.hai lan so duoc viet boi cac chu so cua so phai tim theo thu tu nguoc lai khong lon hon so do

Tim so co hai chu so, biet chu so hang don vi hon chu so hang chuc la 3, tong cua so phai tim va so viet theo thu tu nguoc lai cua so do bang 143

tim mot so co 5 chu so sao cho khi nhan so do voi 9 ta duoc mot so moi co 5 chu so viet theo thu tu nguoc lai so phai tim . So can tim la

Tim mot so co hai chu so biet khi viet so do theo tu tu nguoc lai ta duoc so moi kem son phai tim 18 don vi va biet tong hai chu so do la 8

tim 1 so tu nhien co 2 chu so biet rang neu viet cac chu so cua so y theo thu tu nguoc lai thi duoc so moi lay so moi chia cho so ban dau thi duoc thuong la 3 DU 13