[рони]

Patrick101,

$(".test__button").on("click", function() {
    var $result = true;
    var indx = preQuestions.map(function(el, i) {
        return el.correctAnswer - 1 + i * 3
    });
    $("input").each(function(i) {
        if (~indx.indexOf(i) && !this.checked || !~indx.indexOf(i) && this.checked) $result = false
    });
    if ($result) $(".results").html("Everything is correct");
    else {
        $(".results").html("Wrong answer");
        $("input").prop("checked", false)
    }
});