diff --git a/PrimePickApp/MainView.swift b/PrimePickApp/MainView.swift
index 4bdca00..232f270 100644
--- a/PrimePickApp/MainView.swift
+++ b/PrimePickApp/MainView.swift
@@ -23,9 +23,7 @@ struct MainView: View {
                     .font(.headline)
                     .padding()
                 
-                Button(action: {
-                    // Hardボタンのアクション
-                }) {
+                NavigationLink(destination: QuizView(difficulty: "Hard")) {
                     Text("Hard")
                         .padding()
                         .frame(maxWidth: .infinity)
@@ -36,9 +34,7 @@ struct MainView: View {
                 .padding(.horizontal, 50)
                 .padding(.bottom, 10)
                 
-                Button(action: {
-                    // Normalボタンのアクション
-                }) {
+                NavigationLink(destination: QuizView(difficulty: "Normal")) {
                     Text("Normal")
                         .padding()
                         .frame(maxWidth: .infinity)
@@ -49,7 +45,7 @@ struct MainView: View {
                 .padding(.horizontal, 50)
                 .padding(.bottom, 10)
                 
-                NavigationLink(destination: QuizView()) {
+                NavigationLink(destination: QuizView(difficulty: "Easy")) {
                     Text("Easy")
                         .padding()
                         .frame(maxWidth: .infinity)
diff --git a/PrimePickApp/QuizData/PrimeData.swift b/PrimePickApp/QuizData/PrimeData.swift
index a6cde75..7440282 100644
--- a/PrimePickApp/QuizData/PrimeData.swift
+++ b/PrimePickApp/QuizData/PrimeData.swift
@@ -22,4 +22,56 @@ final class PrimeData {
         }
         return twoDigitPrimes
     }
+    
+    public func generateThreeDigitPrimes() -> [Int] {
+        var twoDigitPrimes = [Int]()
+        outerLoop: for num in 100..<1000 {
+            for i in 2..<num {
+                if num % i == 0 {
+                    continue outerLoop
+                }
+            }
+            twoDigitPrimes.append(num)
+        }
+        return twoDigitPrimes
+    }
+    
+    public func generateFourDigitPrimes() -> [Int] {
+        var twoDigitPrimes = [Int]()
+        outerLoop: for num in 1000..<10000 {
+            for i in 2..<num {
+                if num % i == 0 {
+                    continue outerLoop
+                }
+            }
+            twoDigitPrimes.append(num)
+        }
+        return twoDigitPrimes
+    }
+    
+    public func generateThreeOrFourDigitPrimes() -> [Int] {
+        var twoDigitPrimes = [Int]()
+        outerLoop: for num in 100..<10000 {
+            for i in 2..<num {
+                if num % i == 0 {
+                    continue outerLoop
+                }
+            }
+            twoDigitPrimes.append(num)
+        }
+        return twoDigitPrimes
+    }
+    
+    public func generateFiveOrSixDigitPrimes() -> [Int] {
+        var twoDigitPrimes = [Int]()
+        outerLoop: for num in 10000..<1000000 {
+            for i in 2..<num {
+                if num % i == 0 {
+                    continue outerLoop
+                }
+            }
+            twoDigitPrimes.append(num)
+        }
+        return twoDigitPrimes
+    }
 }
diff --git a/PrimePickApp/QuizView.swift b/PrimePickApp/QuizView.swift
index 592638d..f181e78 100644
--- a/PrimePickApp/QuizView.swift
+++ b/PrimePickApp/QuizView.swift
@@ -10,8 +10,19 @@ import SwiftUI
 struct QuizView: View {
     let primeData = PrimeData()
     var primes: [Int]
-    init() {
-        primes = primeData.generateOneOrTwoDigitPrimes()
+    let difficulty: String
+    
+    init(difficulty: String) {
+        self.difficulty = difficulty
+        if self.difficulty == "Easy" {
+            primes = primeData.generateOneOrTwoDigitPrimes()
+        } else if self.difficulty == "Normal" {
+            primes = primeData.generateThreeDigitPrimes()
+        } else if self.difficulty == "Hard" {
+            primes = primeData.generateFourDigitPrimes()
+        } else {
+            primes = []
+        }
     }
 
     var body: some View {
@@ -23,5 +34,5 @@ struct QuizView: View {
 }
 
 #Preview {
-    QuizView()
+    QuizView(difficulty: "Easy")
 }