Tim mot so chan co nam chu so khac nhau biet rang chu so hang chuc nghin gap ba lan chu so hang don vi chu so hang nghin gap 5 lan chu so hang chuc va chu so hang tram gap 4 lan chu so hang chuc .

Tim so le co bon chu so,biet chu so hang chuc gap 3 lan chu so hang don vi,chu so hang tram gap 2 lan chu so hang chuc va chu so hang nghin gap 4 lan chu so hang don vi

Tim so le co bon chu so,biet chu so hang chuc gap 3 lan chu so hang don vi,chu so hang tram gap 2 lan chu so hang chuc va chu so hang nghin gap 4 lan chu so hang don vi.

tim mot so chan co nam chu so khac nhau ,biet rang chu so hang chuc nghin gap 3 lan chu so hang don vi,chu so hang nghin gap 5 lan chu so hang chucva chu so hang tram gap 4 lan chu so hang chuc

mot so chan co 4 chu so biet rang hang tram va chu so  hang chuc lap thanh mot so gap 3 lan chu so hang nghin va gsp 2 lan chu so hang don vi

cho 1 so chan co 4 chu so trong do chu so hang tram va hang chuc lap thanh 1 so gap 3 lan chu so hang nghin va 2 lan chu so hang don vi so da cho la.................................................

1.tim 2 so tu nhien co hieu bang 2002 va tich bang 2006.

2.cho 100 so tu nhien 1,2,3,4,....100.

co the chon duoc 71 so tu nhien sao cho tong cua chung bang tong cua 29 so con lai khong

3.mot so chan co 4 chu so , trong do so tao boi chu so hang tram va hang chuc gap 3 lan chu so hang nghin va gap 2 lan chu so hang don vi .

[CAC BAN GHI LOI GIAI GIUP MINH NHE MINH CAM ON]

Bai 1:Cho so tu nhien A co 4 chu so. Co chu so hang don vi gap 3 lan chu so hang tram chu so hang chuc gap 8 lan chu so hang nghin. Biet A chia het cho 9.Tim A

Bai 2: Tim tat ca cac so dang 6x14y. Biet rang so do chia het cho 3,4 va 5

tim so co 4 chu so,biet chu so hang don vi gap 2 lan chu so hang chuc ,chu so hang chuc gap 2 lan chu so hang tram ,chu so hang tram gap 2 lan chu so hang nhginn.So do la: ?