C# in Visual Studio

C# in Visual Studio
C# Program Determining if a number is either a multiple of ten or within a particular set of ranges I have a few loops that I need in my program. I can also write out the c# code but I'm not entirely sure how to write them logically. I need Program that will enter 10 numbers and display the count of number according to ranges. Ranges are 1-10, 11-20, 21-30, 31-40, 41-50, Greater than 50: OUT OF RANGE. [using conditional and looping statement] Just like this example:

Ex.
Input 1:    10
Input 2:    15
Input 3: 12
Input 4: 17
Input 5: 20
Input 6: 30
Input 7: 24
Input 8: 6
Input 9: 3
Input 10: 36

Output:
Number of counts.
1-10:   3
11-20:  4
21-30:  2
31-40:  1
41-50:  0
Out of range: 0
and the second one is Program that will display the following output [using conditional and looping statement] Sequence: A is multiplied to B and added to C.

Just like this:

A   B   C
1   2   1
2   4   3
3   6   5
4   8   7
5   10  9
6   12  11
7   14  13
8   16  15
9   18  17
10  20  19

Output
3
11
23
39
59
83
111
143
179
219
This is for a snakes and ladders board game, if it makes any more sense for my question. I imagine the first if statement can write it out like

foreach(number in positivenumberArray)
    {
    if (41 > 50)
        Console.Writeline("Out of Range");
    else if(31 > 40)
        Console.Writeline("Range 40-50");
    else if(21 > 30)
        Console.Writeline("Range 30-40");
    else if(11 > 20)
        Console.Writeline("Range 20-30");
    else if(1 > 10)
        Console.Writeline("Range 10-20");
    else
        Console.Writeline("Range 0-10");
    }
but there has to be something smarter than that to be correct?
The second one I have no idea.