宝娘

<div class=quote><b>以下是引用<i>davidhyb</i>在2008-4-23 16:46:00的发言：</b><br>
       
        <p>ai let me just give u a hint,&#160; if u choose a number between 99-90 </p>
        <p>&#160;</p>
        <p>the number can be discribed as (90+X); so if u add the two digitals, it will be (9+X)</p>
        <p>&#160;</p>
        <p>and now substract from the original: (90+x)-(9+x)= 81 </p>
        <p>&#160;</p>
        <p>so this is math. </p>
        <p>&#160;</p>
        <p>end of story.</p>
        <p>&#160;</p>
        <p>thank you</p>






哇～～～我要做你小弟～～～老大好～～
       
</div><p></p>

fenzi

<p>妙啊，虽然不是每次都准！</p>