.ex1 {
   width: 95%;
   margin: auto;
   text-align: justify;
   font-weight:normal;
   border: 0px solid #73AD21;
}
.question {
   width: 95%;
   min-height: 60px;
   padding: 10px;
   margin: auto;
   text-align: justify;
   font-weight:normal;
   border: 0px solid rgb(10,134,108);
}
.intro {
   width: 85%;
   text-align: center;
   font-weight:bold;
   margin: auto;
   border: 0px solid #73AD21;
}
button.btn {
   width: 75%;
   margin: auto;
}

.page-link {
    position: relative;
    display: block;
    padding: 0.5rem 0.75rem;
    margin-left: -1px;
    line-height: 1.25;
    color: rgb(10,134,108);
    background-color: #fff;
    border: 1px solid rgb(10,134,108);
}

.page-item.active .page-link {
    z-index: 1;
    color: white;
    background-color: rgb(10,134,108);
    border-color: rgb(10,134,108);
}

.page-item a.page-link:hover  {
    z-index: 1;
    color: white;
    background-color: rgb(10,134,108);
    border-color: rgb(10,134,108);
}