May 9, 2011

數學題

讓我來考考大家,
如下:
第一題:
(a-x)(b-x)(c-x)(d-x)(e-x)(f-x).............(z-x)=?
第二題:
8+9+2=3
6+9+2+5=2
4+8+6+0=?
第三題:
2+5+4=2
1+3+9+4=3
6+8+2+3=?

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