Елена Абрамова

let arr = [10, 20, 30, 50, 235, 3000];

for (var i = 0; i < arr.length; i++) {

if (String(arr[i])[0] == '1' || String(arr[i])[0] == '2' || String(arr[i])[0] == '5') {

console.log(arr[i]);
}
}