using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        int[] numbers = {67, 92, 153, 15};

        var nums = from n in numbers

            where n > 30 && n < 100

            select n;

        foreach (var n in nums)

            {

                Console.Write($"{n} "); // 67, 92

            }

    }

}