test

by Neil Daley

HTML

<div>
TEST
</div>
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Find the sum of all the multiples of 3 or 5 below 500.
<br/><br/>
<p id='pAnswer' style= "color:blue; background-color:yellow"></p>

JavaScript

var ans = [];
var k = 0;

for (var i = 1; i < 500; i++) {
    if (i % 3 === 0 || i % 5 === 0) {
        ans[k] = i;
        k++;
    }
}

var sum = 0;

for (var i = 0; i < ans.length; i++) {
    sum += ans[i];
}

document.getElementById('pAnswer').innerHTML = sum;