Hello Manish,
To input x , the syntax is $("input.formulas_number:eq(0)").val({x});
To input x , the syntax is $("input.formulas_number:eq(0)").val({x});
You could put this line in a function triggered by clicking the check button: $('.submit').on('click', foobar); and maybe other navigation buttons:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script>
$(window).on("load", function() {
$('.submit').on('click', foobar);
$('.submitbtns').on('click', foobar);
function foobar() {
$("input.formulas_number:eq(0)").val({x});
}
});
</script>
To change a value, in the answer box, that has been checked, use $("input.formulas_number:eq(0)").attr("value",{x});