function threeDividable(){
	var num = prompt("enter your number","");
	var sum = 0;
	for(var i = 0; i < num.length; i++){
		sum += +num[i];
		}
	if(sum%3 == 0){
		alert("yeas");
	}
	else{
		alert("no");
	}
}

function isMirror(){
	var num = prompt("enter your number","");
	for(var i = 0; i < num.length/2; i++){
		if(num[i] != num[num.length-i-1]){
			return false;
			}
		}
	return true;
}

function whichIsGreater(){
	var num1 = +prompt("enter 1 number","");
	var num2 = +prompt("enter 2 number","");

	if(num1*Math.log10(num2) > num2*Math.log10(num1)){
		alert("Second is greater");
		}
	else if(num1*Math.log(num2) == num2*Math.log(num1)){
		alert("They are equal");
		}
	else{
		alert("First is greater");
	}
}