answered the questions

exercise1.dart

@@ -1,9 +1,34 @@
+import 'dart:io';
+
 /**
  * Exercise 1
  * Create a program that asks the user to enter their name and their age. 
  * Print out a message that tells how many years they have to be 100 years old.
  */
 
+import 'dart:io';
+
+//my answer
 main(List<String> args) {
-
-}
+  maina();
+  mainu();
+}
+
+void maina() {
+  print("Enter your name here:");
+  String name = stdin.readLineSync();
+
+  print("Enter your Age here:");
+  int n = int.parse(stdin.readLineSync());
+  int sum = 100 - n;
+  print("Hey,$name! your have to add $sum to your age to be 100 years");
+}
+
+void mainu() {
+  stdout.write("What's your name? ");
+  String name = stdin.readLineSync();
+  print("Hi, $name! What is your age?");
+  int age = int.parse(stdin.readLineSync());
+  int yearsToHunderd = 100 - age;
+  print("$name, You have $yearsToHunderd years to be 100");
+}

exercise10.dart

@@ -0,0 +1,41 @@
+/**
+ * Exercise 10
+ * Ask the user for a number and determine whether the number is prime or not.
+ * Do it using a function
+ */
+import 'dart:io';
+
+main(List<String> args) {
+  // prime();
+  mainbu();
+}
+
+// void prime() {
+//   print("Enter your number here:");
+//   int j = int.parse(stdin.readLineSync());
+//   if (j % 2 == 1 || j % 3 ==1) {
+//     print("The Number is a PRIME Number");
+//   } else if (j % 2 != 1 || j % 3 != 1) {
+//     print("The Number is NOT a PRIME Number");
+// }//else if(j % 3 == 0){
+//   print("The Number is NOT a PRIME Number");
+// }
+//}
+
+void mainbu() {
+  stdout.write("Please give us a number: ");
+  int chosenNumber = int.parse(stdin.readLineSync());
+  checkPrime(chosenNumber);
+}
+
+void checkPrime(int number) {
+  // List comprehensions
+  List<int> a = [
+    for (var i = 1; i <= number; i++)
+      if (number % i == 0) i
+  ];
+  // Check for prime
+  a.length == 2
+      ? print("The chosen number is a prime")
+      : print("The chosen number is not a prime");
+}

exercise2.dart

@@ -3,7 +3,32 @@
  * Ask the user for a number. 
  * Depending on whether the number is even or odd, print out an appropriate message to the user.
  */
+import 'dart:io';
 
 main(List<String> args) {
-
-}
+  maind();
+  maina();
+}
+//my answer
+maind() {
+  print("Enter your number here:");
+  int b = int.parse(stdin.readLineSync());
+  //for(var i in b){
+  if (b % 2 == 0) {
+    print("The Number you entered is an EVEN number");
+  } else {
+    print("The Number you entered is an ODD number");
+  }
+}
+
+void maina() {
+  stdout.write("Hi, please choose a number: ");
+  int number = int.parse(stdin.readLineSync());
+  if (number % 2 == 0) {
+    print("Chosen number is even");
+  } else {
+    print("Chosen number is odd");
+  }
+}
+
+//}

exercise3.dart

@@ -6,5 +6,32 @@
  */
 
 main(List<String> args) {
-
-}
+  exercise();
+  mainj();
+}
+
+void exercise() {
+  /// EXERCISE 33333
+  var lista = [1, 1, 2, 3, 8, 13, 21, 34, 55, 89];
+  var ert = 5;
+
+  for (var ctr in lista) {
+    if (ctr < ert) {
+      print(ctr);
+    }
+  }
+}
+
+void mainj() {
+  List<int> a = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89];
+  for (var i in a) {
+    if (i < 5) {
+      print(i);
+    }
+  }
+  // One liner
+  print([
+    for (var i in a)
+      if (i < 5) i
+  ]);
+}

exercise4.dart

@@ -6,6 +6,31 @@
  * For example, 13 is a divisor of 26 because 26 / 13 has no remainder.
  */
 
+import 'dart:io';
+
 main(List<String> args) {
-
-}
+  fuji();
+  mainle();
+}
+
+void fuji() {
+  print("Enter your number here:");
+  int deg = int.parse(stdin.readLineSync());
+  dynamic i = new List();
+  for (var b = 1; b <= deg; b++) {
+    if (deg % b == 0) {
+      i.add(b);
+    }
+  }
+  print(i);
+}
+
+void mainle() {
+  stdout.write("Please choose a number: ");
+  int number = int.parse(stdin.readLineSync());
+  for (var i = 1; i <= number; i++) {
+    if (number % i == 0) {
+      print(i);
+    }
+  }
+}

exercise5.dart

@@ -8,5 +8,24 @@
  */
 
 main(List<String> args) {
+  example();
+}
+
+void example(){
+
+  List<int> a = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89];
+  List<int> b = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 89];
+  Set<int> c = {};
+  for (var i in a) {
+    for (var j in b) {
+      if (i == j) {
+        c.add(i);
+      }
+    }
+  }
+  print(c.toList());
+  // One liner using set intersections
+  print(Set.from(a).intersection(Set.from(b)).toList());
+}
 
-}
+

exercise6.dart

@@ -0,0 +1,26 @@
+/**
+ * Exercise 6
+ * Ask the user for a string and print out whether this string is a palindrome or not.
+ * A palindrome is a string that reads the same forwards and backwards.
+ */
+import 'dart:io';
+
+main(List<String> args) {
+  //jumie();
+  juke();
+}
+
+// void jumie() {
+//   print("Enter your word here:");
+//   String name = stdin.readLineSync();
+// }
+
+void juke(){
+  stdout.write("Please give a word: ");
+  String input = stdin.readLineSync().toLowerCase();
+  String revInput = input.split('').reversed.join('');
+  // Ternary operator
+  input == revInput
+      ? print("The word is palindrome")
+      : print("The word is not a palindrome");
+}

exercise7.dart

@@ -0,0 +1,38 @@
+/**
+ * Exercise 7
+ * Let’s say you are given a list saved in a variable:
+ * a = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100]. 
+ * Write a Dart code that takes this list and makes a new list that has only the even 
+ * elements of this list in it.
+ */
+
+main(List<String> args) {
+  fresh();
+  tabe();
+}
+
+void fresh() {
+  var a = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100];
+  for (var ctr in a) {
+    if (ctr % 2 == 0) {
+      print(ctr);
+    }
+  }
+}
+
+void tabe() {
+  List<int> a = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100];
+  int i = 0;
+  List<int> l = [];
+  for (var e in a) {
+    if (++i % 2 == 0) {
+      l.add(e);
+    }
+  }
+  print(l);
+  // One liner
+  print([
+    for (var e in a)
+      if (++i % 2 == 0) e
+  ]);
+}

exercise8.dart

@@ -0,0 +1,52 @@
+/**
+ * Exercise 8
+ * Make a two-player Rock-Paper-Scissors game against computer.
+ * Ask for player’s input, compare them, print out a message to the winner.
+ */
+
+import 'dart:io';
+import 'dart:math';
+
+main(List<String> args) {
+  maindin();
+
+}
+
+
+void maindin() {
+  print("Welcome to Rock, Paper, Scissors\nType 'exit' to stop the game");
+  final random = Random();
+  // Rules of the game
+  Map<String, String> rules = {
+    "rock": "scissors",
+    "scissors": "paper",
+    "paper": "rock"
+  };
+  // Initial score
+  int user = 0;
+  int comp = 0;
+  // Options for computer to choose
+  List<String> options = ["rock", "paper", "scissors"];
+  // Actual game
+  while (true) {
+    String compChoice = options[random.nextInt(options.length)];
+    stdout.write("\nPlease choose Rock, Paper or Scissors: ");
+    String userChoice = stdin.readLineSync().toLowerCase();
+    if (userChoice == "exit") {
+      print("\nYou: $user Computer: $comp\nBye Bye!");
+      break;
+    }
+    if (!options.contains(userChoice)) {
+      print("Incorrect choice");
+      continue;
+    } else if (compChoice == userChoice) {
+      print("We have a tie!");
+    } else if (rules[compChoice] == userChoice) {
+      print("Computer wins: $compChoice vs $userChoice");
+      comp += 1;
+    } else if (rules[userChoice] == compChoice) {
+      print("You win: $userChoice vs $compChoice");
+      user += 1;
+    }
+  }
+}

exercise9.dart

@@ -0,0 +1,48 @@
+/**
+ * Exercise 9
+ * Generate a random number between 1 and 100. Ask the user to guess the number, 
+ * then tell them whether they guessed too low, too high, or exactly right.
+ * Keep track of how many guesses the user has taken, and when the game ends, print this out.
+ */
+
+import 'dart:io';
+import 'dart:math';
+
+main(List<String> args) {
+  tube();
+}
+
+void tube() {
+  print("Type exit to quit the game");
+  guessingGame();
+}
+
+guessingGame() {
+  final random = Random();
+  int randNumber = random.nextInt(100);
+  int attempt = 0;
+  while (true) {
+    attempt += 1;
+    stdout.write("Please choose a number between 0 and 100: ");
+    String chosenNumber = stdin.readLineSync();
+    // Make sure user does not go out of limits
+    if (chosenNumber.toLowerCase() == "exit") {
+      print("\nBye");
+      break;
+    } else if (int.parse(chosenNumber) > 100) {
+      print("Please do not go over 100");
+      continue;
+    }
+    // Main logic
+    if (int.parse(chosenNumber) == randNumber) {
+      print("Bingo! You tried $attempt times\n");
+      continue;
+    } else if (int.parse(chosenNumber) > randNumber) {
+      print("You are higher");
+      continue;
+    } else {
+      print("You are lower");
+      continue;
+    }
+  }
+}