help with a vb maths program

Im a total newbie when it comes to vb stuff
i got a little mathsprogram im trying to get done, i have 3 option buttons and then a start button, what i want to do is when i have a certain option clicked (easy, medium and hard) and when i click start, i want some random numbers come up (for easy it will be 1 digit numbers, medium will have 2 digits, and hard 3 digits)

my whole code is
[vb]
Public dang1 As Integer
Public dang2 As Integer
Public dang3 As Integer
Dim value As Integer

Private Sub check_Click()
Let dang1 = num1.Text
Let dang2 = num2.Text
Let dang3 = num3.Text
If dang1 + dang2 = dang3 Then
Call MsgBox("That answer is correct!", vbOKOnly, "Correct")
Else
Call MsgBox("That answer is wrong, Try again!", vbOKOnly, "Incorrect")
End If
End Sub

Private Sub easy_Click()
Randomize Timer 'The text box fields where the answer and questions appear.
Let num1.Text = Int(Rnd * 10)
Let num2.Text = Int(Rnd * 10)
Let dang1 = num1.Text
Let dang2 = num2.Text
End Sub

Private Sub exit_Click()
End
End Sub

Private Sub hard_Click()
Randomize Timer 'The text box fields where the answer and questions appear.
Let num1.Text = Int(Rnd * 1000)
Let num2.Text = Int(Rnd * 1000)
Let dang1 = num1.Text
Let dang2 = num2.Text
End Sub

Private Sub medium_Click()
Randomize Timer 'The text box fields where the answer and questions appear.
Let num1.Text = Int(Rnd * 100)
Let num2.Text = Int(Rnd * 100)
Let dang1 = num1.Text
Let dang2 = num2.Text
End Sub

Private Sub start_Click()
Randomize Timer 'The text box fields where the answer and questions appear.
Let num1.Text = Int(Rnd * 10)
Let num2.Text = Int(Rnd * 10)
Let dang1 = num1.Text
Let dang2 = num2.Text
End Sub[/vb]

Could I just make a suggestion before u get to far.

One methid could be to assign an offSet to one block of code only.

What I mean is don't use 3 blocks, Hard, Med, Easy. Just use
one, and use the "Selection" to dictate the offSet Value.
Like:

VB Code:

Select Case True
  Case OptHard
      offSet = 1000
  Case OtpMed
     offSet = 100
  Case OptEasy
     offSet = 10
End Select

And just use the bolck code once with the offSet:

VB Code:

Randomize Timer 'The text box fields where the answer and questions appear. 
 
 Randomize
 
 Let num1.Text = Int(Rnd * offSet) 
 Let num2.Text = Int(Rnd * offSet) 
 Let dang1 = num1.Text 
 Let dang2 = num2.Text