diff --git a/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/out/production/FizzBuzz_Challenge1/FizzBuzz.class b/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/out/production/FizzBuzz_Challenge1/FizzBuzz.class
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diff --git a/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/out/production/FizzBuzz_Challenge1/TestFizzBuzz.class b/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/out/production/FizzBuzz_Challenge1/TestFizzBuzz.class
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diff --git a/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/student_effort_fizzbuzz/FizzBuzz.java b/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/student_effort_fizzbuzz/FizzBuzz.java
new file mode 100644
index 000000000..3c96e2db7
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/student_effort_fizzbuzz/FizzBuzz.java
@@ -0,0 +1,42 @@
+public class FizzBuzz {
+
+    public void printNumbers(){
+            String s = "";
+          for(Integer i=1; i<=100; i++){
+                if(isDivisibleBy3(i)){
+                    s += "Fizz ";
+                }else if(isDivisibleBy5(i)){
+                    s += "Buzz ";
+                }else if(isDivisibleBy3And5(i)){
+                    s += "FizzBuzz ";
+                }else if(isDivisibleBy7(i)){
+                    s += "Rizz ";
+                }else if(isDivisibleBy11(i)){
+                    s += "Jazz ";
+                }else{
+                    s += i.toString() + " ";
+                }
+          }
+        System.out.println(s);
+    }
+
+    public boolean isDivisibleBy3(int number){
+        return number % 3 == 0;
+    }
+
+    public boolean isDivisibleBy5(int number){
+        return number % 5 == 0;
+    }
+
+    public boolean isDivisibleBy3And5(int number){
+        return number % 3 == 0 && number % 5 == 0;
+    }
+
+    public boolean isDivisibleBy7(int number){
+        return number % 7 == 0;
+    }
+
+    public boolean isDivisibleBy11(int number){
+        return number % 11 == 0;
+    }
+}
diff --git a/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/student_effort_fizzbuzz/TestFizzBuzz.java b/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/student_effort_fizzbuzz/TestFizzBuzz.java
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index 000000000..5261fa246
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/FizzBuzz_Challenge1/student_effort_fizzbuzz/TestFizzBuzz.java
@@ -0,0 +1,6 @@
+public class TestFizzBuzz {
+    public static void main(String[] args) {
+            FizzBuzz b = new FizzBuzz();
+            b.printNumbers();
+    }
+}
diff --git a/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/out/production/FooBarQix_Challenge2/FooBarQix.class b/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/out/production/FooBarQix_Challenge2/FooBarQix.class
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diff --git a/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/out/production/FooBarQix_Challenge2/TestFooBarQix.class b/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/out/production/FooBarQix_Challenge2/TestFooBarQix.class
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index 000000000..2feac4edb
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diff --git a/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/student_effort_foobarqix/FooBarQix.java b/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/student_effort_foobarqix/FooBarQix.java
new file mode 100644
index 000000000..8c32cdde3
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/student_effort_foobarqix/FooBarQix.java
@@ -0,0 +1,76 @@
+public class FooBarQix {
+
+    public String compute(int number){
+        String s = "";
+            if(number % 3 == 0){
+                s += "Foo";
+            }
+            if(number % 5 == 0){
+                s += "Bar";
+            }
+            if(number % 7 == 0){
+                s += "Qix";
+            }
+
+            char[] digits = String.valueOf(number).toCharArray();
+            for(int digit : digits){
+                if(digit == '3') {
+                    s += "Foo";
+                }
+                if(digit == '5') {
+                    s += "Bar";
+                }
+                if(digit == '7') {
+                    s += "Qix";
+                }
+            }
+            if(s.isEmpty()){
+                s = "" + number;
+            }
+            return s;
+    }
+
+    public String compute2(int number){
+        String s = "";
+        boolean isDivisible = false;
+        if(number % 3 == 0){
+            s += "Foo";
+            isDivisible = true;
+        }
+        if(number % 5 == 0){
+            s += "Bar";
+            isDivisible = true;
+        }
+        if(number % 7 == 0){
+            s += "Qix";
+            isDivisible = true;
+        }
+
+        char[] digits = String.valueOf(number).toCharArray();
+        for(char digit : digits){
+            if(digit == '3') {
+                s += "Foo";
+            }
+            else if(digit == '5') {
+                s += "Bar";
+            }
+            else if(digit == '7') {
+                s += "Qix";
+            }
+            else if(digit == '0'){
+                s += "*";
+            }
+            else if(!isDivisible){
+                s += digit;
+            }
+        }
+        return s;
+    }
+
+    public void printNumbers(){
+        for(int i=1; i<=101; i++){
+            //System.out.println(i + " => " + this.compute(i));
+            System.out.println(i + " => " + this.compute2(i));
+        }
+    }
+}
diff --git a/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/student_effort_foobarqix/TestFooBarQix.java b/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/student_effort_foobarqix/TestFooBarQix.java
new file mode 100644
index 000000000..a31ec480d
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/FooBarQix_Challenge2/student_effort_foobarqix/TestFooBarQix.java
@@ -0,0 +1,6 @@
+public class TestFooBarQix {
+    public static void main(String[] args) {
+            FooBarQix b = new FooBarQix();
+            b.printNumbers();
+    }
+}
diff --git a/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/out/production/PairsOf2_Challenge3/PairsOf2.class b/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/out/production/PairsOf2_Challenge3/PairsOf2.class
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diff --git a/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/out/production/PairsOf2_Challenge3/TestPairsOf2.class b/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/out/production/PairsOf2_Challenge3/TestPairsOf2.class
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diff --git a/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/student_effort_pairsof2/PairsOf2.java b/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/student_effort_pairsof2/PairsOf2.java
new file mode 100644
index 000000000..2afd63abe
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/student_effort_pairsof2/PairsOf2.java
@@ -0,0 +1,2 @@
+public class PairsOf2 {
+}
diff --git a/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/student_effort_pairsof2/TestPairsOf2.java b/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/student_effort_pairsof2/TestPairsOf2.java
new file mode 100644
index 000000000..7934c2662
--- /dev/null
+++ b/_1_basics/src/main/java/code/_4_student_effort/PairsOf2_Challenge3/student_effort_pairsof2/TestPairsOf2.java
@@ -0,0 +1,4 @@
+public class TestPairsOf2 {
+    public static void main(String[] args) {
+   }
+}