3 files changed, 92 insertions, 0 deletions
diff --git a/challenge-146/eric-cheung/excel-vba/Challenge_146.xlsm b/challenge-146/eric-cheung/excel-vba/Challenge_146.xlsm
new file mode 100755
index 0000000000..c4e8ff0908
--- /dev/null
+++ b/challenge-146/eric-cheung/excel-vba/Challenge_146.xlsm
diff --git a/challenge-146/eric-cheung/excel-vba/ch-1.bas b/challenge-146/eric-cheung/excel-vba/ch-1.bas
new file mode 100755
index 0000000000..d67a6d4137
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+++ b/challenge-146/eric-cheung/excel-vba/ch-1.bas
@@ -0,0 +1,47 @@
+Attribute VB_Name = "ModTask_01"
+Option Explicit
+
+Public Const strMyTitle As String = "Eric Cheung"
+
+Option Base 1
+Public nPrimeArr() As Long
+
+Function IsPrime(nInput As Integer) As Boolean
+
+    Dim nNumLoop As Integer
+    
+    For nNumLoop = LBound(nPrimeArr) To UBound(nPrimeArr)
+        If nInput Mod nPrimeArr(nNumLoop) = 0 Then
+            IsPrime = False
+            Exit Function
+        End If
+    Next nNumLoop
+
+    IsPrime = True
+    
+End Function
+
+Sub Task_01()
+
+    Const nPrimeCntMax As Integer = 10001
+
+    Dim nLoop As Integer, nPrimeCnt As Integer
+    
+    ReDim nPrimeArr(1 To 1)
+    
+    nPrimeCnt = 1
+    nPrimeArr(1) = 2
+    nLoop = 3
+
+    Do While (nPrimeCnt < nPrimeCntMax)
+        If IsPrime(nLoop) Then
+            nPrimeCnt = nPrimeCnt + 1
+            ReDim Preserve nPrimeArr(1 To nPrimeCnt)
+            nPrimeArr(nPrimeCnt) = nLoop
+        End If
+        nLoop = nLoop + 1
+    Loop
+
+    MsgBox nPrimeArr(nPrimeCnt), vbOKOnly, strMyTitle
+
+End Sub
diff --git a/challenge-146/eric-cheung/excel-vba/ch-2.bas b/challenge-146/eric-cheung/excel-vba/ch-2.bas
new file mode 100755
index 0000000000..aa7c7d16ca
--- /dev/null
+++ b/challenge-146/eric-cheung/excel-vba/ch-2.bas
@@ -0,0 +1,45 @@
+Attribute VB_Name = "ModTask_02"
+Option Explicit
+
+Sub FindCuriousFractionTree(ByVal nNumerator As Integer, ByVal nDenominator As Integer, ByRef nParentNumerator As Integer, ByRef nParentDenominator As Integer)
+
+    If nNumerator > nDenominator Then
+        nParentNumerator = nNumerator - nDenominator
+        nParentDenominator = nDenominator
+    ElseIf nNumerator = nDenominator Then
+        nParentNumerator = nNumerator
+        nParentDenominator = nDenominator
+    Else
+        nParentNumerator = nNumerator
+        nParentDenominator = nDenominator - nNumerator
+    End If
+
+End Sub
+
+Sub Task_02()
+
+    ''Credit: https://gdaymath.com/lessons/fractions/5-3-a-curious-fraction-tree/
+    
+    '' Example 1
+    '' Const nNumeratorInput As Integer = 3
+    '' Const nDenominatorInput As Integer = 5
+    
+    '' Example 2
+    Const nNumeratorInput As Integer = 4
+    Const nDenominatorInput As Integer = 3
+    
+    Dim strMsg As String
+    Dim nNumeratorInputParent As Integer, nDenominatorInputParent As Integer
+    Dim nNumeratorInputGrandParent As Integer, nDenominatorInputGrandParent As Integer
+    
+    FindCuriousFractionTree nNumeratorInput, nDenominatorInput, nNumeratorInputParent, nDenominatorInputParent
+    FindCuriousFractionTree nNumeratorInputParent, nDenominatorInputParent, nNumeratorInputGrandParent, nDenominatorInputGrandParent
+    
+    strMsg = "Parent: " & nNumeratorInputParent & " / " & nDenominatorInputParent
+    strMsg = strMsg & vbNewLine
+    strMsg = strMsg & "GrandParent: " & nNumeratorInputGrandParent & " / " & nDenominatorInputGrandParent
+
+    MsgBox strMsg, vbOKOnly, strMyTitle
+    
+End Sub
+