i want reduce space between column; see page talking @ http://mathstructure.com/add-subtract-multiply-and-divide/
users of webpage cannot see other 2 column me out please:
<div class="container"> <div class="row"> <ol class="breadcrumb"> <li><a href="/">home</a></li> <li><a href="/flashcards">flashcards</a></li> <li class="active">addition, subtraction, multiplication, division</li> </ol> </div> <div class="row"> <div class="col-md-6"> <div class="row"> <div class="mcq_cont"> <div class="ans_not"> <p class="upperp"></p> <p class="lowerp"></p> </div> <div class="ans_ok"> <p class="upperok"></p> <p class="lowerok"></p> </div> <div class="question_cont_mcq shadowstyle"> <div class="qcont_inner"> <p class="a fibq1">9999</p> </div> <div class="qcont_inner"> <p class="fibq2"> <span class="fibsign">+</span> <span class="b">999</span> </p> </div> <hr> </div> <div class="ans_mcq_cont"> <div class="ans_mcq" id="a1"></div> <div class="ans_mcq" id="a2"></div> <div class="ans_mcq" id="a3"></div> <div class="ans_mcq" id="a4"></div> </div> </div> <div class="fib_cont"> <div class="ans_not"> <p class="upperp"></p> <p class="lowerp"></p> </div> <div class="ans_ok"> <p class="upperok"></p> <p class="lowerok"></p> </div> <div class="question_cont shadowstyle"> <div class="qcont_inner"> <p class="a fibq1">9999</p> </div> <div class="qcont_inner"> <p class="fibq2"> <span class="fibsign">+</span> <span class="b">999</span> </p> </div> <hr> </div> <input type="text" class="fib_in" id="answer_input" /> <input type="submit" class="ans" value="answer"/> </div> </div> <div class="row"> <div class="stat"> <p class="statpleft">number correct :</p> <p class="statpright" id="stat_correct">0</p> <p class="statpleft">number attempted:</p> <p class="statpright" id="stat_attempt">0</p> <p class="statpleft">percentage:</p> <p class="statpright" id="stat_percent">33</p> <p class="statpleft final_content" id="final_message"></p> <p class="statpright final_content" id="stat_percent"> <input type="submit" class="restart" value="restart" /> </p> </div> </div> </div> <div class="col-md-6"> <div class="row"> <div class="col-xs-6"> <div class="option_cont"> <p class="heading_option">problem type</p> <div class="options op1"> <input type="radio" id="gtype1" name="gtype" checked /><label for="gtype1"> addition</label> </div> <div class="options op2"> <input type="radio" id="gtype2" name="gtype" /><label for="gtype2"> subtraction</label> </div> <div class="options op1"> <input type="radio" id="gtype3" name="gtype" /><label for="gtype3"> multiplication</label> </div> <div class="options op2"> <input type="radio" id="gtype4" name="gtype" /><label for="gtype4"> division</label> </div> </div> </div> <div class="col-xs-6"> <div class="option_cont"> <p class="heading_option">difficulty</p> <div class="options op1"> <input type="radio" id="difficult1" name="difficult" checked /><label for="difficult1"> easy (0-8)</label> </div> <div class="options op2"> <input type="radio" id="difficult2" name="difficult" /><label for="difficult2"> medium (1-12)</label> </div> <div class="options op1"> <input type="radio" id="difficult3" name="difficult" /><label for="difficult3"> hard (1-18)</label> </div> <div class="options op1"> <input type="radio" id="difficult4" name="difficult" /><label for="difficult4"> expert (1-100)</label> </div> </div> </div> </div> <div class="row"> <div class="col-xs-6"> <div class="option_cont"> <p class="heading_option">answer type</p> <div class="options op1"> <input type="radio" id="atype2" name="atype"/><label for="atype2"> multiple choice</label> </div> <div class="options op2"> <input type="radio" id="atype1" name="atype" checked/><label for="atype1"> fill in blank</label> </div> </div> </div> <div class="col-xs-6"> <div class="option_cont"> <p class="heading_option">number entry</p> <div class="options op1"> <input type="radio" id="numberentrynormal" name="numberentry" checked /><label for="numberentrynormal"> normal</label> </div> <div class="options op2"> <input type="radio" id="numberentryrighttoleft" name="numberentry" /><label for="numberentryrighttoleft"> right left</label> </div> </div> </div> </div> <div class="row"> <div class="col-xs-6"> <div class="option_cont"> <p class="heading_option">math fact</p> <div class="options"> <select id="math_fact_select"> <option value="random" selected>random <option value="0">0 <option value="1">1 <option value="2">2 <option value="3">3 <option value="4">4 <option value="5">5 <option value="6">6 <option value="7">7 <option value="8">8 <option value="9">9 <option value="10">10 <option value="11">11 <option value="12">12 <option value="13">13 <option value="14">14 <option value="15">15 <option value="16">16 <option value="17">17 <option value="18">18 <option value="19">19 <option value="20">20 </select> </div> </div> </div> <div class="col-xs-6"> <div class="option_cont"> <p class="heading_option">number of problems</p> <div class="options"> <select id="num_problems_select"> <option>10 <option>20 <option>25 <option>50 <option selected>100 </select> </div> </div> </div> </div> <div class="row"> <div class="col-xs-12"> <div class="restart_cont"> <input type="submit" class="restart" value="restart" /> </div> </div> </div> </div> </div> </div> <div class="themebackgroundcolor footer"> <hr> <center> <a href="/info/about.html" target="_top">about</a> | <a href="/info/sponsor.html" target="_top">sponsors</a> | <a href="/info/privacy_policy.html" target="_top">privacy policy</a> <p> <i> copyright © 1998-2014 mathstructure.com (education 4 free, llc) </i> </p> </center> </div>
you have in total 3 columns. instead of using col-md-6 can divide col-md-4 = 12 grid. should solve problem take @ image preview. http://snag.gy/zgi7a.jpg