I think this will help full to you.
use display: none;
css for 3rd column 3rd div and 5th column 5th div in responsive of 979px
@media screen and (max-width: 979px) {
[class*='yjsg-col-'] {
width: 50%;
}
.yjsg-col-1 {
width:100%;
}
[class*='yjsg-col-1-']:nth-child(odd):last-child{
/*color:red;*/
display:none;
}
}
updated Fiddle
Note : In fiddle I have highlighted the selected columns with red color please note that one