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.blog-pager,#blog-pager{font-family:"Times New Roman", Times, serif;font-weight:normal;font-size:12px;width:700px;padding:17px;} 
.showpageNum a,.showpage a {background:#069; color:#FFF; margin-right:.6em;text-decoration:none;font-size:15px;font-style:italic;line-height:0;text-align:center;padding:12px 18px 12px;-moz-border-radius:36px;-webkit-border-radius:36px;border-radius:36px;} 
.showpageNum a:hover,.showpage a:hover {background:orange; color:#FFF; margin-right:.6em;text-decoration:none;font-size:15px;font-style:italic;line-height:0;text-align:center;padding:12px 18px 12px;-moz-border-radius:36px;-webkit-border-radius:36px;border-radius:36px;}
.showpageOf{margin:0 8px 0 0;font-family:'Coming Soon', cursive;text-decoration:none;font-size:100%;}
.showpagePoint {background:orange; color:#FFF; margin-right:.6em;text-decoration:none;font-size:15px;font-style:italic;line-height:0;text-align:center;padding:12px 18px 12px;-moz-border-radius:36px;-webkit-border-radius:36px;border-radius:36px;}

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<script type='text/javascript'>;
var home_page=&#39;/&#39;;
var urlactivepage=location.href;
var postperpage=12;
var numshowpage=3;
var upPageWord =&#39;  &#9668;  &#39;;
var downPageWord =&#39;  &#9658;  &#39;;
</script>
<script type='text/javascript'>
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</script>

Replace the series var postperpage = 12; the number that represents the posts would appear on first page.