trys

var permutations = [],
    numberArray = '1234567890'.split('');

function swap(a, b) {
    var tmp = numberArray[a];
    numberArray[a] = numberArray[b];
    numberArray[b] = tmp;
}

// Use Heap's algorithm to swap around numbers

trys

var carryup = 0,
    triangle = [
        [75],
        [95, 64],
        [17, 47, 82],
        [18, 35, 87, 10],
        [20, 4, 82, 47, 65],
        [19, 1, 23, 75, 3, 34],
        [88, 2, 77, 73, 7, 63, 67],
        [99, 65, 4, 28, 6, 16, 70, 92],

trys

var divisors = function( a ) {
        var divisorList = [];
        for (var i = 1; i <= a / 2; i++) {
            if ( a % i === 0 ) {
                divisorList.push( i );
            }
        }
        return divisorList;
    },
    

trys

var names = names.sort(),
    alpha = {
        A: 1,
        B: 2,
        C: 3,
        D: 4,
        E: 5,
        F: 6,
        G: 7,
        H: 8,

trys

var results = [],
    a,
    b;

function divisors( a ) {
    var divisor = [];
    for (var i = 1; i <= a / 2; i++) {
        if ( a % i === 0 ) {
            divisor.push( i );
        }

trys

function factorial( n ) {
    var product = bigInt(1);
    for (var i = n; i > 0; i--) {
        product = product.multiply( i );
    }
    return product.toString();
}

var number = factorial( 100 ),
    result = 0;

trys

var date,
    counter = 0;

for (var i = 1901; i <= 2000; i++) {
    for (var j = 1; j <= 12; j++) {
        date = new Date( i + '-' + pad( j ) + '-01' );
        if ( date.getDay() === 0 ) {
            counter++;
        }
    }

trys

function nameNumber( count ) {

    var ones = [ '', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen' ],
        tens = [ 'zero', 'ten', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety' ];

    // Thousands
    if ( count === 1000 ) {
        return 'one thousand';
    }

trys

var result = 0,
	count = 0;

result = bigInt(2).pow( 1000 ).toString();

for (var i = result.length - 1; i >= 0; i--) {
	count += parseInt( result[ i ] );
}

document.write( count );

trys

var result = 0,
	i,
	j;

for ( i = 1; i <= 20; i++ ) {
	result = 1;
	for ( j = (2*i) - i + 1; j <= (2*i); j++) {
		result *= j;
	}