function genRandomInt() {
	for(;;) {
		var r = Math.random();
		//alert(r);
		r = r*11;
		//alert(r);
		r = Math.floor(r);
		//alert(r);
		if(r > 0) {
			return r;
		}
	}
}

function writeQuestion() {
	var x1 = genRandomInt();
	var x2 = genRandomInt();
	document.write(x1 + ' + ' + x2 + ' is ');
	
	var ans = x1+x2;
	var dspAns = genRandomInt() + '' + ans;
	
	document.write('<input type="hidden" name="mathanswer" value="' + dspAns + '"/>');
}