The below code shows how to use the class

import druva.NumberUtil;
trace(NumberUtil.getRand(5, 10));

This is the actual class for validation

package druva{
	import flash.display.Sprite;

	public class NumberUtil extends Sprite {
		public function NumberUtil() {
		}

		public static function getRand(min:Number, max:Number):Number {
			return Math.floor(Math.random()*(max+1-min))+min;
		}

	}
}