diff --git a/src/lab/exp4/quiz.html b/src/lab/exp4/quiz.html
index d6e6db68..b492f55a 100644
--- a/src/lab/exp4/quiz.html
+++ b/src/lab/exp4/quiz.html
@@ -85,7 +85,7 @@
 <input name="Q5" type="radio" value="1">a. contigously<br>
 <input name="Q5" type="radio" value="2">b. randomly<br>
 <br>
-<li><b>If the memory address of the first element of an array is 2000, what is the memory address of the 6th emement</b></li>
+<li><b>If the memory address of the first element of an array is 2000, what is the memory address of the 6th emement   (data type is int)</b></li>
 <input name="Q6" type="radio" value="1">a. 2020<br>
 <input name="Q6" type="radio" value="2">b. 2012<br>
 <input name="Q6" type="radio" value="3">c. 2006<br>