Sub valnum()
Dim cellule As Range, ws As Worksheet
Set ws = ActiveWorkbook.Worksheets(1)
For Each cellule In ws.Range("B1", "G5")
If IsNumeric(cellule) Then
MsgBox cellule.Address, Title:="Première cellule numérique"
MsgBox ws.Range("E3").Value, Title:="Valeur de E3"
Exit For
End If
Next cellule
End Sub