Các câu hỏi tương tự
tim cac so a,b,c biet rang abc -ca =ca-ac
Bai 1 : a) Tim abcd biet : a x bcd 1001 b) Tim ab ; biet ab x aba ababBai 2 Tim so co hai chu so, biet rang neu viet them chu so 6 vao ben trai so da cho thi duoc so moi gap 7 lan so cu.Bai 3: Tim so co ba chu so, biet rang neu viet them chu so 3 vao ben trai so da cho thi duoc so moi gap 7 lan so doBai 4 :a) Tim cac so a7b cung chia het cho 5 va 9 b) Tim cac aso 1ab cung chia het cho 5 va 3Bai 5 : Tim so co hai chu so, biet rang so do chia cho hang don vi cua...
Đọc tiếp
Bai 1 :
a) Tim abcd biet : a x bcd = 1001 b) Tim ab ; biet ab x aba = abab
Bai 2 Tim so co hai chu so, biet rang neu viet them chu so 6 vao ben trai so da cho thi duoc so moi gap 7 lan so cu.
Bai 3: Tim so co ba chu so, biet rang neu viet them chu so 3 vao ben trai so da cho thi duoc so moi gap 7 lan so do
Bai 4 :
a) Tim cac so a7b cung chia het cho 5 va 9 b) Tim cac aso 1ab cung chia het cho 5 va 3
Bai 5 : Tim so co hai chu so, biet rang so do chia cho hang don vi cua no thi duoc thuong la 6, du 5.
Bai 6: Cho so co hai chu so trong do chu so hang don vi la 7. Tim so da cho, biet rang neu chia so do cho tong cac chu so cua no thi duoc thuong la 5 va du 12.
tim cac so a,b,c,d khac nhau biet rang abc x c=dac
tim cac so co ba chu so biet rang so do gap 20 lan tong cac chu so
tim so co hai chu so biet rang tong cac chu so bang 7 va tich cac chu so bang chu so hang chuc
tim tat ca cac so co 2 chu so biet rang tich cac chu so cua so do deu bang nhau
Tim so tu nhien co 2 chu so biet rang
a. So do gap 6 lan tong cac chu so cua no
b. So do gap 7 lan tong cac chu so cua no
c. So do gap 8 lan tong cac chu so cua no
d. So do gap 9 lan tong cac chu so cua no
tim mot so tu nhien co hai chu so , biet rang tong cac so do voi cac chu so cua no la 103
tim so co hai chu so biet rang so do gap 8 lan tong cac chu so