const decimalToHex = num => parseInt(num, 10).toString(2);

const createCounter = num => content => num.split('').filter(i => i === content).length;

for (let i = 500; i < 1000; i++) {
const counter = createCounter(decimalToHex(i));

if (counter('0') > counter('1')) {
console.log(i);
}
}