diff --git a/exercises/functions/functions1.rs b/exercises/functions/functions1.rs
index 3112527..d4ef0fb 100644
--- a/exercises/functions/functions1.rs
+++ b/exercises/functions/functions1.rs
@@ -1,8 +1,12 @@
 // functions1.rs
 // Make me compile! Execute `rustlings hint functions1` for hints :)
 
-// I AM NOT DONE
+
 
 fn main() {
     call_me();
 }
+
+fn call_me(){
+    
+}
\ No newline at end of file
diff --git a/exercises/functions/functions2.rs b/exercises/functions/functions2.rs
index 5721a17..fe2e969 100644
--- a/exercises/functions/functions2.rs
+++ b/exercises/functions/functions2.rs
@@ -1,13 +1,13 @@
 // functions2.rs
 // Make me compile! Execute `rustlings hint functions2` for hints :)
 
-// I AM NOT DONE
+
 
 fn main() {
     call_me(3);
 }
 
-fn call_me(num:) {
+fn call_me(num:u32) {
     for i in 0..num {
         println!("Ring! Call number {}", i + 1);
     }
diff --git a/exercises/functions/functions3.rs b/exercises/functions/functions3.rs
index e3c1bf7..8545f5b 100644
--- a/exercises/functions/functions3.rs
+++ b/exercises/functions/functions3.rs
@@ -1,10 +1,10 @@
 // functions3.rs
 // Make me compile! Execute `rustlings hint functions3` for hints :)
 
-// I AM NOT DONE
+
 
 fn main() {
-    call_me();
+    call_me(5);
 }
 
 fn call_me(num: i32) {
diff --git a/exercises/functions/functions4.rs b/exercises/functions/functions4.rs
index 58637e4..21e2a14 100644
--- a/exercises/functions/functions4.rs
+++ b/exercises/functions/functions4.rs
@@ -4,14 +4,14 @@
 // This store is having a sale where if the price is an even number, you get
 // 10 Rustbucks off, but if it's an odd number, it's 3 Rustbucks off.
 
-// I AM NOT DONE
+
 
 fn main() {
     let original_price = 51;
     println!("Your sale price is {}", sale_price(original_price));
 }
 
-fn sale_price(price: i32) -> {
+fn sale_price(price: i32) -> i32{
     if is_even(price) {
         price - 10
     } else {
diff --git a/exercises/functions/functions5.rs b/exercises/functions/functions5.rs
index d22aa6c..e037369 100644
--- a/exercises/functions/functions5.rs
+++ b/exercises/functions/functions5.rs
@@ -1,7 +1,7 @@
 // functions5.rs
 // Make me compile! Execute `rustlings hint functions5` for hints :)
 
-// I AM NOT DONE
+
 
 fn main() {
     let answer = square(3);
@@ -9,5 +9,5 @@ fn main() {
 }
 
 fn square(num: i32) -> i32 {
-    num * num;
+    num * num
 }
diff --git a/exercises/if/if1.rs b/exercises/if/if1.rs
index 9086754..eb18eb0 100644
--- a/exercises/if/if1.rs
+++ b/exercises/if/if1.rs
@@ -1,6 +1,6 @@
 // if1.rs
 
-// I AM NOT DONE
+
 
 pub fn bigger(a: i32, b: i32) -> i32 {
     // Complete this function to return the bigger number!
@@ -8,6 +8,7 @@ pub fn bigger(a: i32, b: i32) -> i32 {
     // - another function call
     // - additional variables
     // Execute `rustlings hint if1` for hints
+    if a > b { a } else { b }
 }
 
 // Don't mind this for now :)
diff --git a/exercises/if/if2.rs b/exercises/if/if2.rs
index 80effbd..5aeff1f 100644
--- a/exercises/if/if2.rs
+++ b/exercises/if/if2.rs
@@ -4,14 +4,14 @@
 // Step 2: Get the bar_for_fuzz and default_to_baz tests passing!
 // Execute the command `rustlings hint if2` if you want a hint :)
 
-// I AM NOT DONE
+
 
 pub fn fizz_if_foo(fizzish: &str) -> &str {
     if fizzish == "fizz" {
         "foo"
-    } else {
-        1
-    }
+    } else if fizzish == "fuzz" {
+        "bar"
+    } else { "baz" }
 }
 
 // No test changes needed!
diff --git a/exercises/quiz1.rs b/exercises/quiz1.rs
index 5c5c355..d8814d4 100644
--- a/exercises/quiz1.rs
+++ b/exercises/quiz1.rs
@@ -7,10 +7,14 @@
 // more than 40 at once, each apple only costs 1! Write a function that calculates
 // the price of an order of apples given the order amount. No hints this time!
 
-// I AM NOT DONE
+
 
 // Put your function here!
-// fn ..... {
+fn calculate_apple_price(num: i32) -> i32 {
+    if num > 40 {
+        1*num
+    } else { 2*num } 
+}
 
 // Don't modify this function!
 #[test]
diff --git a/exercises/variables/variables1.rs b/exercises/variables/variables1.rs
index 4a3af73..8dd6937 100644
--- a/exercises/variables/variables1.rs
+++ b/exercises/variables/variables1.rs
@@ -6,9 +6,9 @@
 // even after you already figured it out. If you got everything working and
 // feel ready for the next exercise, remove the `I AM NOT DONE` comment below.
 
-// I AM NOT DONE
+
 
 fn main() {
-    x = 5;
+    let x = 5;
     println!("x has the value {}", x);
 }
diff --git a/exercises/variables/variables2.rs b/exercises/variables/variables2.rs
index 7774a8f..f7f4da5 100644
--- a/exercises/variables/variables2.rs
+++ b/exercises/variables/variables2.rs
@@ -1,10 +1,10 @@
 // variables2.rs
 // Make me compile! Execute the command `rustlings hint variables2` if you want a hint :)
 
-// I AM NOT DONE
+
 
 fn main() {
-    let x;
+    let x: u32 = 0;
     if x == 10 {
         println!("Ten!");
     } else {
diff --git a/exercises/variables/variables3.rs b/exercises/variables/variables3.rs
index 30ec48f..91b3172 100644
--- a/exercises/variables/variables3.rs
+++ b/exercises/variables/variables3.rs
@@ -1,10 +1,10 @@
 // variables3.rs
 // Make me compile! Execute the command `rustlings hint variables3` if you want a hint :)
 
-// I AM NOT DONE
+
 
 fn main() {
-    let x = 3;
+    let mut x = 3;
     println!("Number {}", x);
     x = 5; // don't change this line
     println!("Number {}", x);
diff --git a/exercises/variables/variables4.rs b/exercises/variables/variables4.rs
index 77f1e9a..ac8a015 100644
--- a/exercises/variables/variables4.rs
+++ b/exercises/variables/variables4.rs
@@ -1,9 +1,9 @@
 // variables4.rs
 // Make me compile! Execute the command `rustlings hint variables4` if you want a hint :)
 
-// I AM NOT DONE
+
 
 fn main() {
-    let x: i32;
+    let x: i32 = -4;
     println!("Number {}", x);
 }
diff --git a/exercises/variables/variables5.rs b/exercises/variables/variables5.rs
index da37ae9..f19b7ea 100644
--- a/exercises/variables/variables5.rs
+++ b/exercises/variables/variables5.rs
@@ -1,11 +1,11 @@
 // variables5.rs
 // Make me compile! Execute the command `rustlings hint variables5` if you want a hint :)
 
-// I AM NOT DONE
+
 
 fn main() {
     let number = "T-H-R-E-E";
     println!("Spell a Number : {}", number);
-    number = 3;
+    let number = 3;
     println!("Number plus two is : {}", number + 2);
 }
diff --git a/exercises/variables/variables6.rs b/exercises/variables/variables6.rs
index 9866691..239485c 100644
--- a/exercises/variables/variables6.rs
+++ b/exercises/variables/variables6.rs
@@ -1,9 +1,9 @@
 // variables6.rs
 // Make me compile! Execute the command `rustlings hint variables6` if you want a hint :)
 
-// I AM NOT DONE
 
-const NUMBER = 3;
+
+const NUMBER:i32 = 3;
 fn main() {
     println!("Number {}", NUMBER);
 }