Problem1

function solve(params) {
    var start = params[0];
    var end = params[1];
    var change = '';
    var fib = '';

    function fibonacci(n) {
        var phi = 0.5 + 0.5 * Math.sqrt(5.0);
        var a = phi * n;
        return n == 0 || Math.abs(Math.round(a) - a) < 1.0 / n;
    }

    for (var i = start; i <= end; i++) {
        var isFib = fibonacci(i);
        if (isFib == true) {
            fib = 'yes';
        } else {
            fib = 'no';
        }

        change += '<tr><td>' + i + '</td>' + '<td>' + i * i + '</td>' + '<td>' + fib + '</td></tr>' + '\n'
    };

    return '<table>' + '\n' +
        '<tr><th>Num</th><th>Square</th><th>Fib</th></tr>' + '\n' + change + '</table>';
}


// console.log(solve(['2', '6']));
// console.log(solve(['55', '56']));