diff --git a/A Concise and Practical Introduction to Programming Algorithms/chapter1/MathFunction.java b/A Concise and Practical Introduction to Programming Algorithms/chapter1/MathFunction.java
index 74a2fda2..689ee2ed 100644
--- a/A Concise and Practical Introduction to Programming Algorithms/chapter1/MathFunction.java	
+++ b/A Concise and Practical Introduction to Programming Algorithms/chapter1/MathFunction.java	
@@ -13,7 +13,7 @@ public static void main(String[] args) {
 
         double x = Math.E;
         double fx = Math.log(x);
-        System.out.print("Is this precisely 1 or is there numerical errors? ");
+        System.out.print("Is this precisely 1 or are there numerical errors? ");
         System.out.println(fx);
 
 
@@ -23,4 +23,4 @@ public static void main(String[] args) {
         System.out.print("What about this trigonometric equality (should be 1) ?");
         System.out.println(fx);
     }
-}
\ No newline at end of file
+}