#pictureNumberMatch #selector {
    width: 48%;
    margin: 20px auto;
  }

  #pictureNumberMatch #selector #choice {
    width: 250px;
    height: 250px;
    display: inline-block;
    vertical-align: middle;
    text-align: center;
    font-size: 60px;
    color: #0C0;
    -webkit-text-stroke: 0px #000;
  }

  #pictureNumberMatch #selector img {
    vertical-align: middle;
    cursor: pointer;
  }

  #pictureNumberMatch #selections {
    text-align: center;
  }

  #pictureNumberMatch #selections div {
    border: 3px solid #888;
    width: 150px;
    height: 150px;
    margin: 5px;
    display: inline-block;
    cursor: pointer;
    font-size: 36px;
    background-size: contain;
    -webkit-text-stroke: 0px #000;
  }

  #pictureNumberMatch .choice0 {
    background-image: url('https://s3.amazonaws.com/cms.accelerate-ed.com/image/15311640-d60e-4b5a-9733-4e516259fcd9.png');
    background-size: contain;
  }

  #pictureNumberMatch .choice1 {
    background-image: url('https://s3.amazonaws.com/cms.accelerate-ed.com/image/3da02849-1233-48b5-a821-323e17045ad4.png');
    background-size: contain;
  }
  
  #pictureNumberMatch .choice2 {
    background-image: url('https://s3.amazonaws.com/cms.accelerate-ed.com/image/2674152d-144d-460e-9a48-31427baa784e.png');
    background-size: contain;
  }

  #pictureNumberMatch .choice3 {
    background-image: url('https://s3.amazonaws.com/cms.accelerate-ed.com/image/d9156d78-d036-46af-b87a-f66238a422f8.png');
    background-size: contain;
  }

  #pictureNumberMatch .choice4 {
    background-image: url('https://s3.amazonaws.com/cms.accelerate-ed.com/image/2b5b5f99-c93c-4e19-b097-c0aff5cb8720.png');
    background-size: contain;
  }