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HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>General Knowledge Quiz</title>
    <style>
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            background-color: #f5f5f5;
            color: #333;
        }
        .container {
            background-color: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
        }
        h1 {
            color: #2c3e50;
            text-align: center;
            margin-bottom: 30px;
        }
        .question-container {
            margin-bottom: 20px;
        }
        .question {
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 15px;
        }
        .options {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin-bottom: 20px;
        }
        .option {
            background-color: #3498db;
            color: white;
            border: none;
            padding: 10px;
            border-radius: 5px;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .option:hover {
            background-color: #2980b9;
        }
        .timer {
            text-align: center;
            font-size: 24px;
            margin: 20px 0;
            color: #e74c3c;
        }
        .progress {
            margin-bottom: 20px;
            font-weight: bold;
        }
        .result {
            text-align: center;
            font-size: 24px;
            margin-top: 20px;
            padding: 20px;
            border-radius: 5px;
            display: none;
        }
        .score {
            font-size: 28px;
            font-weight: bold;
            margin: 10px 0;
        }
        .start-btn, .next-btn {
            background-color: #2ecc71;
            color: white;
            border: none;
            padding: 10px 20px;
            border-radius: 5px;
            cursor: pointer;
            font-size: 18px;
            display: block;
            margin: 0 auto;
            transition: background-color 0.3s;
        }
        .start-btn:hover, .next-btn:hover {
            background-color: #27ae60;
        }
        .next-btn {
            display: none;
        }
        .correct {
            background-color: #2ecc71 !important;
        }
        .wrong {
            background-color: #e74c3c !important;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>General Knowledge Quiz</h1>
        
        <div id="start-screen">
            <p>Total of 20 questions will be asked.</p>
            <p>You have 15 seconds for each question.</p>
            <p>Good luck!</p>
            <button class="start-btn" onclick="startQuiz()">Start</button>
        </div>
        
        <div id="quiz-screen" style="display: none;">
            <div class="progress">
                Question <span id="question-number">1</span>/20 - Score: <span id="score">0</span>
            </div>
            <div class="timer" id="timer">15</div>
            <div class="question-container">
                <div class="question" id="question"></div>
                <div class="options" id="options"></div>
            </div>
            <button class="next-btn" id="next-btn" onclick="nextQuestion()">Next Question</button>
        </div>
        
        <div id="result-screen" class="result" style="display: none;">
            <h2>Quiz Finished!</h2>
            <div class="score">Your Score: <span id="final-score">0</span>/100</div>
            <p id="result-message"></p>
            <button class="start-btn" onclick="resetQuiz()">Play Again</button>
        </div>
    </div>

let currentQuestion = 0;
        let score = 0;
        let timer;
        let timeLeft = 15;
        let shuffledQuestions = [];

function startQuiz() {
            document.getElementById('start-screen').style.display = 'none';
            document.getElementById('quiz-screen').style.display = 'block';
            
            // Shuffle questions
            shuffledQuestions = [...questions].sort(() => Math.random() - 0.5);
            
            showQuestion();
            startTimer();
        }

function showQuestion() {
            if (currentQuestion >= 20) {
                showResult();
                return;
            }

const question = shuffledQuestions[currentQuestion];
            document.getElementById('question').textContent = question.question;
            document.getElementById('question-number').textContent = currentQuestion + 1;
            document.getElementById('score').textContent = score;

const optionsContainer = document.getElementById('options');
            optionsContainer.innerHTML = '';

question.options.forEach(option => {
                const button = document.createElement('button');
                button.className = 'option';
                button.textContent = option;
                button.onclick = () => selectAnswer(option[0]);
                optionsContainer.appendChild(button);
            });

document.getElementById('next-btn').style.display = 'none';
        }

if (selectedOption === question.answer) {
                score += 5;
                document.getElementById('score').textContent = score;
            }

document.getElementById('next-btn').style.display = 'block';
        }

function resetQuiz() {
            currentQuestion = 0;
            score = 0;
            timeLeft = 15;
            
            document.getElementById('result-screen').style.display = 'none';
            document.getElementById('start-screen').style.display = 'block';
        }
    </script>
</body>
</html>

CSS