路人DF 寫到:qeypour 寫到:30=0+0+6+7+8+9
=1+1+4+7+8+9
=1+1+5+6+8+9
=2+2+3+6+8+9
=2+2+4+5+8+9
=2+2+4+6+7+9
=2+2+5+6+7+8
=3+3+1+6+8+9
=3+3+2+5+8+9
=3+3+2+6+7+9
=3+3+4+5+7+8
=4+4+2+3+8+9
=4+4+1+5+7+9
=4+4+1+6+7+8
=4+4+2+5+7+8
=4+4+3+5+6+8
=5+5+1+2+8+9
=5+5+1+3+7+9
=5+5+1+4+7+8
=5+5+2+3+7+8
=5+5+2+4+6+8
=5+5+3+4+6+7
=6+6+2+3+4+9
=6+6+1+4+5+8
=6+6+2+3+5+8
=6+6+2+4+5+7
=7+7+1+2+5+8
=7+7+1+2+4+9
=7+7+1+3+4+8
=8+8+1+2+5+6
=8=8+1+2+4+7
=8+8+1+3+4+6
=8+8+2+3+4+5
=9+9+1+2+3+6
共240+37*6!/2!=13560
不知有沒有漏算
至少漏寫551469,991245
個人覺得這題應交由電腦運算比較恰當
不然位數跟數字和都很大時應非人腦可負荷
不知J+W兄有無妙法快解?