Tim 4 so tu nhien co 3 chu so thoa man cac dieu kien sau day
1) cac so nay phan biet nhung co chu so dau tien giong nhau
2) tong cua bon so chia het cho 3 trong 4 so do
Tim 4 so
Started By vdtuan, 13-06-2006 - 09:59
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