14

using System;

namespace ConsoleApp3
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int randomMinNumber = 9;
            int randomMaxNumber = 26;
            Random random = new Random();
            int index = 0;
            int resultNumberCount = 0;
            int minRange = 50;
            int maxRange = 150;

            int number = random.Next(randomMinNumber, randomMaxNumber);

            for (index = 0; index <= maxRange; index += number)
            {
                if (index >= minRange && index <= maxRange)
                {
                    resultNumberCount++;
                }
            }

            Console.WriteLine($"Количество чисел от {minRange} до {maxRange} (включая эти числа), которые кратны {number} - {resultNumberCount}");
        }
    }
}