 All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars  perplexus dot info  Odd and Even 3 (Posted on 2016-04-04) Determine the total number of values of a positive integer N having at most four digits such that:

(i) The digit 1 occurs an odd number of times in N, and:

(ii) Each of the digits 2, 0 and 6 occurs an even number of times in N. (An even number includes zero), and:

(iii ) Any of the remaining six digits may or may not occur in N.

 No Solution Yet Submitted by K Sengupta No Rating Comments: ( Back to comment list | You must be logged in to post comments.) computer solution | Comment 1 of 6

763 values of N

from

DefDbl A-Z
Dim crlf\$

Form1.Visible = True

Text1.Text = ""
crlf = Chr\$(13) + Chr\$(10)

For n = 1 To 9999
ns\$ = LTrim(Str(n))
For i = 1 To Len(ns)
Select Case Mid(ns, i, 1)
Case 0: ct0 = ct0 + 1
Case 1: ct1 = ct1 + 1
Case 2: ct2 = ct2 + 1
Case 6: ct6 = ct6 + 1
End Select
Next
If ct1 Mod 2 = 1 Then
If ct0 Mod 2 = 0 Then
If ct2 Mod 2 = 0 Then
If ct6 Mod 2 = 0 Then
hitct = hitct + 1
End If
End If
End If
End If
Next

Text1.Text = Text1.Text & crlf & hitct & " done"

End Sub

Edited on April 5, 2016, 10:28 pm
 Posted by Charlie on 2016-04-04 19:14:42 Please log in:

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