diff --git a/package.json b/package.json
index bae3e8c..5e359f0 100644
--- a/package.json
+++ b/package.json
@@ -14,8 +14,10 @@
     "@commitlint/cli": "^19.3.0",
     "@commitlint/config-conventional": "^19.2.2",
     "axios": "^1.7.2",
+    "clsx": "^2.1.1",
     "pinia": "^2.1.7",
     "primeicons": "^7.0.0",
+    "tailwind-merge": "^2.3.0",
     "vue": "^3.4.21",
     "vue-awesome-paginate": "^1.1.46",
     "vue-router": "4",
diff --git a/src/api/examsRepository.ts b/src/api/examsRepository.ts
index 7375e9c..7d0d646 100644
--- a/src/api/examsRepository.ts
+++ b/src/api/examsRepository.ts
@@ -1,13 +1,14 @@
 import AxiosClient from "./axios";
 
 const resource = "/category";
+const resourceExam = "/exam";
 
 export default {
   get(classId: string, currentPage: number) {
     return AxiosClient.get(`${resource}/${classId}/exams?page=${currentPage}`);
   },
   getOne(exerciseId: string) {
-    return AxiosClient.get(`/exam/${exerciseId}`);
+    return AxiosClient.get(`${resourceExam}/${exerciseId}`);
   },
   search(searchText: string, page: number) {
     return AxiosClient.post('/search', {
@@ -15,5 +16,8 @@ export default {
       page: page || 1,
     });
   },
+  submit(formData: any) {
+    return AxiosClient.post(`${resourceExam}/submit`, formData);
+  }
 }
 
diff --git a/src/components/Button/ButtonUtils.vue b/src/components/Button/ButtonUtils.vue
new file mode 100644
index 0000000..d720fa4
--- /dev/null
+++ b/src/components/Button/ButtonUtils.vue
@@ -0,0 +1,22 @@
+<template lang="">
+  <button
+    :class="cn('border rounded px-4 py-2 hover:text-white flex items-center justify-center gap-2 transition ease-linear w-full md:w-fit', props.className)"
+    @click="props.func"
+  >
+    <slot/>
+  </button>
+</template>
+
+<script setup>
+  import { cn } from "@/utils/cn";
+
+  const props = defineProps({
+    className: {
+      type: String,
+    },
+    func: {
+      type: Function,
+      required: true
+    }
+  })
+</script>
\ No newline at end of file
diff --git a/src/components/DoExercise/Question.vue b/src/components/DoExercise/Question.vue
index cbf0d7c..f3fba6f 100644
--- a/src/components/DoExercise/Question.vue
+++ b/src/components/DoExercise/Question.vue
@@ -1,11 +1,15 @@
 <template lang="">
   <div class="mb-5">
-    <h1 v-html="props.name" class="mb-2"></h1>
-    <p v-for="(ans, idx) in props.answers" :key="ans.id" class="text-[1rem] leading-4 mb-4 px-1 flex items-center">
+        
+    <h1 
+      v-html="props.name"
+      :class="{'text-red-500' : props.warning}"
+    ></h1>
+    <p v-for="(ans, idx) in props.answers" :key="ans.id" class="text-[1rem] leading-4 mb-4 px-1 flex items-center mt-2">
       <input 
         :id="'question-'+props.questionId+'-'+idx" 
         type="radio" 
-        :value="idx" 
+        :value="ans.name" 
         v-model="checked"
         class="w-4 h-4 bg-gray-100 border-gray-300 cursor-pointer focus:outline-none"
       />
@@ -21,8 +25,9 @@
 </template>
 
 <script setup>
-  import console from "console";
-import { ref } from "vue";
+  import { ref, watch } from "vue";
+  const emit = defineEmits(["update-answer"]);
+
   const props = defineProps({
     name: {
       type: String,
@@ -35,8 +40,23 @@ import { ref } from "vue";
     questionId: {
       type: Number,
       required: true,
+    },
+    questionIdx: {
+      type: Number,
+      required: true,
+    },
+    pageIdx: {
+      type: Number,
+      required: true,
+    },
+    warning: {
+      type: Boolean,
     }
   });
 
   const checked = ref();
+
+  watch(() => checked.value, ()=>{
+    emit("update-answer", checked.value, props.pageIdx, props.questionIdx)
+  })
 </script>
\ No newline at end of file
diff --git a/src/components/DoExercise/Quote.vue b/src/components/DoExercise/Quote.vue
new file mode 100644
index 0000000..f703d8f
--- /dev/null
+++ b/src/components/DoExercise/Quote.vue
@@ -0,0 +1,20 @@
+<template lang="">
+  <i class="block md:mb-8 mb-5 text-base md:text-xl md:px-8 px-2" v-html="quote">
+  </i>
+</template>
+
+<script setup>
+  import { ref, onMounted } from "vue";
+  const quote = ref("");
+
+  onMounted(async ()=> {
+    const API_KEY = "SltTB9eBPK6on57H/Vlygg==1GGt23U1uXtMedKH";
+    const response = await fetch("https://api.api-ninjas.com/v1/quotes?category=learning", {
+      headers: {
+        'x-api-key': API_KEY,
+      }
+    });
+    const quoteData = await response.json();
+    quote.value = `${quoteData[0].quote} - <b>${quoteData[0].author}</b>`;
+  });
+</script>
\ No newline at end of file
diff --git a/src/components/DoExercise/Results.vue b/src/components/DoExercise/Results.vue
new file mode 100644
index 0000000..504a6ce
--- /dev/null
+++ b/src/components/DoExercise/Results.vue
@@ -0,0 +1,73 @@
+<template lang="">
+  <div class="text-center">
+    <h1 class="text-3xl md:text-4xl my-4 md:my-6 font-bold">
+      {{ isSubmitHaveNiceResult(props.results.score)?"Xin chúc mừng!":"Bạn có thể thử lại lần nữa."}}
+    </h1>
+    <p>Với <span class="text-green-500 font-bold">{{ props.results.correctAnswers }}/{{ props.results.totalQuestion }}</span> câu trả lời đúng. Điểm của bạn là</p>
+    <h1 
+      :class="'text-4xl font-bold my-6 ' + (isSubmitHaveNiceResult(props.results.score)?'text-green-500':'text-red-400')"
+    >{{ props.results.score }}</h1>
+    <div class="flex md:flex-row flex-col gap-3 md:gap-5 flex-wrap md:my-10 my-5 justify-center items-center px-2">
+      <ButtonUtils
+        className="bg-[#f0f9eb] border-[#c2e7b0] hover:bg-[#67c23a] text-[#67c23a]"
+        :func="handleTryAgain"
+      >
+        <Icon icon="pi-sync"/>
+        Thử làm lại
+      </ButtonUtils>
+
+      <ButtonUtils
+        className="bg-[#fdf6ec] border-[#f5dab1] hover:bg-[#e6a23c] text-[#e6a23c]"
+        :func="handleShowResults"
+      >
+        <Icon icon="pi-file-check"/>
+        Xem đáp án chi tiết
+      </ButtonUtils>
+
+      <ButtonUtils
+        className="bg-[#f4f4f5] border-[#d3d4d6] hover:bg-[#909399] text-[#909399]"
+        :func="handleDoMore"
+      >
+        <Icon icon="pi-send"/>
+        Làm các đề khác
+      </ButtonUtils>
+    </div>
+
+    <Quote/>
+  </div>
+</template>
+
+<script setup>
+  import ButtonUtils from "@/components/Button/ButtonUtils.vue";
+  import Icon from "@/components/Icon.vue";
+  import Quote from "@/components/DoExercise/Quote.vue";
+  import router from "@/router";
+
+  const props = defineProps({
+    slug: {
+      type: String,
+      required: true,
+    },
+    results: {
+      type: Object,
+      required: true,
+    }
+  });
+
+  function isSubmitHaveNiceResult(score) {
+    return score >= 5;
+  }
+
+  function handleTryAgain() {
+    window.location.reload();
+  }
+
+  function handleDoMore() {
+    router.push({ name: 'exercise', params: { classId: props.slug } });
+  }
+
+  function handleShowResults() {
+    alert("This feature will show the results and implement later");
+  }
+
+</script>
\ No newline at end of file
diff --git a/src/utils/cn.ts b/src/utils/cn.ts
new file mode 100644
index 0000000..f408c26
--- /dev/null
+++ b/src/utils/cn.ts
@@ -0,0 +1,6 @@
+import { ClassValue, clsx } from "clsx";
+import { twMerge } from "tailwind-merge";
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}
\ No newline at end of file
diff --git a/src/views/DoExercisePage.vue b/src/views/DoExercisePage.vue
index 47eb38b..22f677c 100644
--- a/src/views/DoExercisePage.vue
+++ b/src/views/DoExercisePage.vue
@@ -1,19 +1,27 @@
 <template lang="">
   <div class="bg-slate-50 m-0 py-2 px-1">
     <div class="md:w-9/12 rounded  mx-auto box-shadow bg-white text-[#606266] flex flex-col">
-      <div v-if="!loadingStore.isLoading && examData">
+      <div v-if="!loadingStore.isLoading && examData && !isShowResults">
         <Title :name="examData.value.exam.name"/>
         <div class="md:px-4 px-2 text-base mb-8">
           <i class="font-medium" v-html="examData.value.exam.pages[0].note">
           </i>
           <div class="my-3 px-3">
-            <Question 
-              v-for="q in examData.value.exam.pages[0].questions"
-              :key="q.id"
-              :name="q.name"
-              :answers="q.answers"
-              :question-id="q.id"
-            />
+            <div
+              v-for="(page, pageIdx) in examData.value.exam.pages"
+            >
+              <Question 
+                v-for="(q, questionIdx) in page.questions"
+                :key="q.id"
+                :name="q.name"
+                :answers="q.answers"
+                :question-id="q.id"
+                :page-idx="pageIdx"
+                :question-idx="questionIdx"
+                :warning="q.warning==false||!isFirstSubmit?false:true"
+                @update-answer="handleUpdateAnswer"
+              />
+            </div>
           </div>
         </div>
 
@@ -24,21 +32,32 @@
           </button>
         </div>
       </div>
+
+      <div v-else-if="!loadingStore.isLoading && isShowResults">
+        <Results
+          :slug="examData.value.category.slug"
+          :results="resultsData.value"
+        />
+      </div>
     </div>
   </div>
 </template>
 
 <script setup>
   import { useRoute } from 'vue-router';
-  import { watch, reactive } from "vue";
+  import { watch, reactive, ref } from "vue";
   import { RepositoryFactory } from "@/api/RepositoryFactory";
   import { useLoadingStore } from "@/store/loading";
   import { toast } from 'vue3-toastify';
   import Title from "@/components/DoExercise/Title.vue";
   import Question from "@/components/DoExercise/Question.vue";
+  import Results from "@/components/DoExercise/Results.vue";
   import Icon from "@/components/Icon.vue";
 
   const examData = reactive([]);
+  const resultsData = reactive([]);
+  const isShowResults = ref(false);
+  const isFirstSubmit = ref(false);
   const loadingStore = useLoadingStore();
   const ExamRepository = RepositoryFactory.get("exams");
   const route = useRoute();
@@ -59,9 +78,43 @@
     });
   }, { immediate: true });
 
-  function submitExam() {
-    alert("This feature will implement later");
+  function handleUpdateAnswer(answer, pageId, questionId) {
+    examData.value.exam.pages[pageId].questions[questionId].answer = answer;
+    examData.value.exam.pages[pageId].questions[questionId].warning = false;
+  } 
+
+  async function submitExam() {
+    isFirstSubmit.value = true;
+    
+    // check all questions have answer from user 
+    for (const page of examData.value.exam.pages) {
+      for (const q of page.questions){
+        if (q.warning==null || q.warning==true || !q.answer || q.answer.length <= 0) {
+          return toast.warning("Vui lòng trả lời hết các câu hỏi (đang bị bôi đỏ) trước khi nộp bài.", {
+            toastStyle: {
+              fontSize: '14px',
+            },
+            position: toast.POSITION.BOTTOM_RIGHT,
+          });
+        }
+      }
+    }
+
+    // submit answer
+    loadingStore.changeLoadingState(true);
+    const { data } = await ExamRepository.submit(examData.value.exam);
+    loadingStore.changeLoadingState(false);
+
+    resultsData.value = data;
+    isShowResults.value = true;
+    toast.success("Nộp bài thành công", {
+      toastStyle: {
+        fontSize: '14px',
+      },
+      position: toast.POSITION.BOTTOM_RIGHT,
+    });
   }
+
 </script>
 
 <style lang="scss">
diff --git a/yarn.lock b/yarn.lock
index 26c067d..ffd1639 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -35,6 +35,13 @@
   resolved "https://registry.npmjs.org/@babel/parser/-/parser-7.24.7.tgz"
   integrity sha512-9uUYRm6OqQrCqQdG1iCBwBPZgN8ciDBro2nIOFaiRz1/BCxaI7CNvQbDHvsArAC7Tw9Hda/B3U+6ui9u4HWXPw==
 
+"@babel/runtime@^7.24.1":
+  version "7.24.7"
+  resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.24.7.tgz#f4f0d5530e8dbdf59b3451b9b3e594b6ba082e12"
+  integrity sha512-UwgBRMjJP+xv857DCngvqXI3Iq6J4v0wXmwc6sapg+zyhbwmQX67LUEFrkK5tbyJ30jGuG3ZvWpBiB9LCy1kWw==
+  dependencies:
+    regenerator-runtime "^0.14.0"
+
 "@commitlint/cli@^19.3.0":
   version "19.3.0"
   resolved "https://registry.yarnpkg.com/@commitlint/cli/-/cli-19.3.0.tgz#44e6da9823a01f0cdcc43054bbefdd2c6c5ddf39"
@@ -789,6 +796,11 @@ cliui@^8.0.1:
     strip-ansi "^6.0.1"
     wrap-ansi "^7.0.0"
 
+clsx@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/clsx/-/clsx-2.1.1.tgz#eed397c9fd8bd882bfb18deab7102049a2f32999"
+  integrity sha512-eYm0QWBtUrBWZWG0d386OGAw16Z995PiOVo2B7bjWSbHedGl5e0ZWaq65kOGgUSNesEIDkB9ISbTg/JK9dhCZA==
+
 color-convert@^1.9.0:
   version "1.9.3"
   resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-1.9.3.tgz#bb71850690e1f136567de629d2d5471deda4c1e8"
@@ -1680,6 +1692,11 @@ readdirp@~3.6.0:
   dependencies:
     picomatch "^2.2.1"
 
+regenerator-runtime@^0.14.0:
+  version "0.14.1"
+  resolved "https://registry.yarnpkg.com/regenerator-runtime/-/regenerator-runtime-0.14.1.tgz#356ade10263f685dda125100cd862c1db895327f"
+  integrity sha512-dYnhHh0nJoMfnkZs6GmmhFknAGRrLznOu5nc9ML+EJxGvrx6H7teuevqVqCuPcPK//3eDrrjQhehXVx9cnkGdw==
+
 require-directory@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/require-directory/-/require-directory-2.1.1.tgz#8c64ad5fd30dab1c976e2344ffe7f792a6a6df42"
@@ -1865,6 +1882,13 @@ supports-preserve-symlinks-flag@^1.0.0:
   resolved "https://registry.npmjs.org/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz"
   integrity sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==
 
+tailwind-merge@^2.3.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/tailwind-merge/-/tailwind-merge-2.3.0.tgz#27d2134fd00a1f77eca22bcaafdd67055917d286"
+  integrity sha512-vkYrLpIP+lgR0tQCG6AP7zZXCTLc1Lnv/CCRT3BqJ9CZ3ui2++GPaGb1x/ILsINIMSYqqvrpqjUFsMNLlW99EA==
+  dependencies:
+    "@babel/runtime" "^7.24.1"
+
 tailwindcss@^3.4.4:
   version "3.4.4"
   resolved "https://registry.npmjs.org/tailwindcss/-/tailwindcss-3.4.4.tgz"