diff --git a/Terms and Types/Common Types/task.md b/Terms and Types/Common Types/task.md
index 0abe37a..7b979f5 100644
--- a/Terms and Types/Common Types/task.md	
+++ b/Terms and Types/Common Types/task.md	
@@ -11,3 +11,10 @@ Note that type names always begin with an upper case letter.
 ## Exercise
 
 Here are some more methods of standard types. Can you guess what they do?
+Complete their invocations.
+
+<div class="hint">The first one in an <code>Int</code> method <code>toHexString</code>, which returns 
+the hexadecimal form of the specified integer value.</div>
+<div class="hint">The <code>contains()</code> method is utilized to check whether a certain element is present in the range/list/set or not.</div>
+<div class="hint">The <code>drop(n)</code> method returns all the elements of the collection except the first <code>n</code> ones.</div>
+<div class="hint">The <code>take()</code> method is utilized to return a new collection consisting of the first <code>n</code> elements of the collection.</div>
diff --git a/Terms and Types/Method Calls/task.md b/Terms and Types/Method Calls/task.md
index f96d1e0..a69652d 100644
--- a/Terms and Types/Method Calls/task.md	
+++ b/Terms and Types/Method Calls/task.md	
@@ -20,10 +20,13 @@ The object on which the method is applied is named the *target object*.
 
 Methods can have *parameters*. They are supplied between parentheses.
 
-In the below examples, the `abs` method returns the absolute value of a
+The `abs` method returns the absolute value of a
 number, and the `toUpperCase` method returns the target `String` in
 upper case.
 
 #### Exercise
 
-Complete the methods invocations.
\ No newline at end of file
+Complete the invocations for the described methods.
+
+<div class="hint">The <code>upperCaseMethod()</code> should return "HELLO, SCALA!"</div>
+<div class="hint">The <code>absMethod()</code> should return 42.</div>
\ No newline at end of file
diff --git a/Terms and Types/Operators/task.md b/Terms and Types/Operators/task.md
index 067301e..5c7735a 100644
--- a/Terms and Types/Operators/task.md	
+++ b/Terms and Types/Operators/task.md	
@@ -29,7 +29,7 @@ The Scala compiler statically checks that you don’t combine incompatible
 expressions.
 <br/>
 <br/>
-Fill the following blank with values whose type is
+Try filling the blank in the code editor with values whose type is
 different from `Int` and see the result.
 
 ## Exercise 
diff --git a/Terms and Types/Primitive Expressions/task.md b/Terms and Types/Primitive Expressions/task.md
index 9b1bdba..bca37fe 100644
--- a/Terms and Types/Primitive Expressions/task.md	
+++ b/Terms and Types/Primitive Expressions/task.md	
@@ -25,15 +25,15 @@
 
   - The number “1”:
 
-    1
+    `1`
  
   - The boolean value "true":
 
-    true
+    `true`
  
   - The text "Hello, Scala!":
 
-    "Hello, Scala!"
+    `"Hello, Scala!"`
  
  (Note the usage of double quotes, `"`).
 
@@ -44,11 +44,11 @@
 
   - How many is one plus two?
 
-    1 + 2
+    `1 + 2`
  
   - What is the result of the concatenation of the texts “Hello, ” and “Scala!”?
 
-    "Hello, " ++ "Scala!"
+    `"Hello, " ++ "Scala!"`
  
  ## Evaluation 
 
@@ -70,4 +70,5 @@
  
  ## Exercise
  
- Complete the expression to return "Hello, Scala!"
+Complete the expression in `sayHello()` to return "Hello, Scala!".
+Complete the expression in `sumTheNumbers()` to return `4`.