diff --git a/Upsilon/BaseTypes/Number/ScriptNumber.cs b/Upsilon/BaseTypes/Number/ScriptNumber.cs
index edaa347..7d8924a 100644
--- a/Upsilon/BaseTypes/Number/ScriptNumber.cs
+++ b/Upsilon/BaseTypes/Number/ScriptNumber.cs
@@ -1,3 +1,5 @@
+using System;
+
 namespace Upsilon.BaseTypes.Number
 {
     internal abstract class ScriptNumber : ScriptType
@@ -41,6 +43,17 @@ namespace Upsilon.BaseTypes.Number
             return new ScriptNumberDouble(((ScriptNumberLong) a).Value * ((ScriptNumberDouble) b).Value);
         }
 
+        public static ScriptNumber operator % (ScriptNumber a, ScriptNumber b)
+        {
+            if (!a.IsFloat && !b.IsFloat)
+                return new ScriptNumberLong(((ScriptNumberLong) a).Value % ((ScriptNumberLong) b).Value);
+            if (a.IsFloat && b.IsFloat)
+                return new ScriptNumberDouble(((ScriptNumberDouble) a).Value % ((ScriptNumberDouble) b).Value);
+            if (a.IsFloat)
+                return new ScriptNumberDouble(((ScriptNumberDouble) a).Value % ((ScriptNumberLong) b).Value);
+            return new ScriptNumberDouble(((ScriptNumberLong) a).Value % ((ScriptNumberDouble) b).Value);
+        }
+
         public static ScriptNumber operator / (ScriptNumber a, ScriptNumber b)
         {
             if (!a.IsFloat && !b.IsFloat)
@@ -60,6 +73,18 @@ namespace Upsilon.BaseTypes.Number
             return new ScriptNumberLong(-((ScriptNumberLong)n).Value);
         }
 
+        public static ScriptNumber Exponent(ScriptNumber a, ScriptNumber b)
+        {
+            if (!a.IsFloat && !b.IsFloat)
+                return new ScriptNumberLong((long) Math.Pow(((ScriptNumberLong) a).Value, ((ScriptNumberLong) b).Value));
+            if (a.IsFloat && b.IsFloat)
+                return new ScriptNumberDouble(Math.Pow(((ScriptNumberDouble) a).Value, ((ScriptNumberDouble) b).Value));
+            if (a.IsFloat)
+                return new ScriptNumberDouble(Math.Pow(((ScriptNumberDouble) a).Value, ((ScriptNumberLong) b).Value));
+            return new ScriptNumberDouble(Math.Pow(((ScriptNumberLong) a).Value, ((ScriptNumberDouble) b).Value));
+        }
+
+
 
         #region Equality
         private bool Equals(ScriptNumber other)
@@ -117,6 +142,7 @@ namespace Upsilon.BaseTypes.Number
 
 
 
+
         public static explicit operator double(ScriptNumber n)
         {
             if (n.IsFloat)
diff --git a/Upsilon/Binder/BoundBinaryOperator.cs b/Upsilon/Binder/BoundBinaryOperator.cs
index 5fb1574..555fbc2 100644
--- a/Upsilon/Binder/BoundBinaryOperator.cs
+++ b/Upsilon/Binder/BoundBinaryOperator.cs
@@ -15,7 +15,9 @@ namespace Upsilon.Binder
             LessEquals,
             Less,
             And,
-            Or
+            Or,
+            Exponent,
+            Remainder
         }
 
         private Type LeftType { get; }
@@ -46,6 +48,8 @@ namespace Upsilon.Binder
             new BoundBinaryOperator(OperatorKind.Subtraction, Type.Number),
             new BoundBinaryOperator(OperatorKind.Multiplication, Type.Number),
             new BoundBinaryOperator(OperatorKind.Division, Type.Number),
+            new BoundBinaryOperator(OperatorKind.Exponent, Type.Number),
+            new BoundBinaryOperator(OperatorKind.Remainder, Type.Number),
 
             // Number equality
             new BoundBinaryOperator(OperatorKind.Equality, Type.Number, Type.Number, Type.Boolean),
@@ -102,6 +106,12 @@ namespace Upsilon.Binder
                 case SyntaxKind.Slash:
                     kind = OperatorKind.Division;
                     break;
+                case SyntaxKind.PercentSign:
+                    kind = OperatorKind.Remainder;
+                    break;
+                case SyntaxKind.RoofSign:
+                    kind = OperatorKind.Exponent;
+                    break;
                 case SyntaxKind.EqualsEquals:
                     kind = OperatorKind.Equality;
                     break;
diff --git a/Upsilon/Evaluator/Evaluator.cs b/Upsilon/Evaluator/Evaluator.cs
index d748d4c..d919cf3 100644
--- a/Upsilon/Evaluator/Evaluator.cs
+++ b/Upsilon/Evaluator/Evaluator.cs
@@ -288,7 +288,7 @@ namespace Upsilon.Evaluator
                     }
                     goto default;
                 case BoundBinaryOperator.OperatorKind.Subtraction:
-                    if (left.Type == Type.Number)
+                    if (left.Type == Type.Number && right.Type == Type.Number)
                     {
                         return ((ScriptNumber)left) - ((ScriptNumber)right);
                     }
@@ -301,7 +301,7 @@ namespace Upsilon.Evaluator
                     }
                     goto default;
                 case BoundBinaryOperator.OperatorKind.Multiplication:
-                    if (left.Type == Type.Number)
+                    if (left.Type == Type.Number && right.Type == Type.Number)
                     {
                         return ((ScriptNumber)left) * ((ScriptNumber)right);
                     }
@@ -314,7 +314,7 @@ namespace Upsilon.Evaluator
                     }
                     goto default;
                 case BoundBinaryOperator.OperatorKind.Division:
-                    if (left.Type == Type.Number)
+                    if (left.Type == Type.Number && right.Type == Type.Number)
                     {
                         return ((ScriptNumber)left) / ((ScriptNumber)right);
                     }
@@ -326,6 +326,18 @@ namespace Upsilon.Evaluator
                         return type;
                     }
                     goto default;
+                case BoundBinaryOperator.OperatorKind.Exponent:
+                    if (left.Type == Type.Number && right.Type == Type.Number)
+                    {
+                        return ScriptNumber.Exponent((ScriptNumber) left, (ScriptNumber) right);
+                    }
+                    goto default;
+                case BoundBinaryOperator.OperatorKind.Remainder:
+                    if (left.Type == Type.Number && right.Type == Type.Number)
+                    {
+                        return ((ScriptNumber)left) % ((ScriptNumber)right);
+                    }
+                    goto default;
                 case BoundBinaryOperator.OperatorKind.Equality:
                     return new ScriptBoolean(Equals(left, right));
                 case BoundBinaryOperator.OperatorKind.Inequality:
diff --git a/Upsilon/Parser/Lexer.cs b/Upsilon/Parser/Lexer.cs
index 9eebd3b..22b65fe 100644
--- a/Upsilon/Parser/Lexer.cs
+++ b/Upsilon/Parser/Lexer.cs
@@ -102,6 +102,10 @@ namespace Upsilon.Parser
                     return new SyntaxToken(SyntaxKind.Comma, _position, ",", null);
                 case '#':
                     return new SyntaxToken(SyntaxKind.PoundSign, _position, "#", null);
+                case '%':
+                    return new SyntaxToken(SyntaxKind.PercentSign, _position, "%", null);
+                case '^':
+                    return new SyntaxToken(SyntaxKind.RoofSign, _position, "^", null);
                 case '"':
                     return LexString();
                 case '=':
diff --git a/Upsilon/Parser/SyntaxKind.cs b/Upsilon/Parser/SyntaxKind.cs
index 14b8941..9a9cf8f 100644
--- a/Upsilon/Parser/SyntaxKind.cs
+++ b/Upsilon/Parser/SyntaxKind.cs
@@ -87,5 +87,7 @@ namespace Upsilon.Parser
         NumericForStatement,
         BreakStatement,
         GenericForStatement,
+        PercentSign,
+        RoofSign
     }
 }
\ No newline at end of file
diff --git a/Upsilon/Parser/SyntaxKindPrecedence.cs b/Upsilon/Parser/SyntaxKindPrecedence.cs
index e39f692..8b4a27b 100644
--- a/Upsilon/Parser/SyntaxKindPrecedence.cs
+++ b/Upsilon/Parser/SyntaxKindPrecedence.cs
@@ -5,13 +5,12 @@ namespace Upsilon.Parser
         public enum Precedence
         {
             None = 0,
-            Or,
-            And,
+            LogicalOr,
+            LogicalAnd,
             Equality,
-            PlusMinus,
-            StarSlash,
+            Additive,
+            Multiplicative,
             Unary,
-            Exponentiation
         }
 
         public static Precedence UnaryOperatorPrecedence(this SyntaxKind kind)
@@ -44,18 +43,23 @@ namespace Upsilon.Parser
 
                 // logical operators
                 case SyntaxKind.AndKeyword:
-                    return Precedence.And;
+                    return Precedence.LogicalAnd;
                 case SyntaxKind.OrKeyword:
-                    return Precedence.Or;
+                    return Precedence.LogicalOr;
 
                 // math operators
                 case SyntaxKind.Plus:
                 case SyntaxKind.Minus:
-                    return Precedence.PlusMinus;
+                    return Precedence.Additive;
 
                 case SyntaxKind.Star:
                 case SyntaxKind.Slash:
-                    return Precedence.StarSlash;
+                case SyntaxKind.PercentSign:
+                case SyntaxKind.RoofSign:
+                    return Precedence.Multiplicative;
+
+
+
                 default:
                     return Precedence.None;
             }