Remove “whitespace” between div element

Answer 1

HTML

CSS

#div1 {
    width:150px;height:100px;white-space:nowrap;
    line-height: 0px;
    border:blue 1px solid;padding:5px;
}
#div1 div {
    width:30px;height:30px;
    border:blue 1px solid;
    display:inline-block;
    *display:inline;zoom:1;
    margin:0px;outline:none;
}

DEMO