Is it the "right" way?

import datetime
import logging
import random

from questions import Add, Multiply


class Quiz:
    questions = []
    answers = []

    def __init__(self):

        for _ in range(10):
            # Generate 10 random questions with numbers from 1 to 10
            random_num1 = random.randint(1, 10)
            random_num2 = random.randint(1, 10)
            question_types = [Add(random_num1, random_num2), Multiply(random_num1, random_num2)]
            chosen_type = random.choice(question_types)
            # Add there questions into self.questions
            self.questions.append(chosen_type)

    def take_quiz(self):
        while True:
            # Log the start time
            logging.basicConfig(level=logging.DEBUG, filename="quiz.log")
            start_time = datetime.datetime.now()
            elapsed_time = datetime.timedelta()
            logging.debug("Quiz started: {}".format(start_time))
            # Ask all of the questions
            for question in self.questions:
                elapsed_time += self.ask(question)
            # Log the end time
            end_time = datetime.datetime.now()
            logging.debug("Quiz ended: {}".format(end_time))
            # Show a summary
            self.summary()
            print("Elapsed time: {} seconds!".format(elapsed_time.seconds))
            break

    def ask(self, question):
        # Log the start time
        start_time = datetime.datetime.now()
        # Capture the answer
        answer = input("{} = ".format(question.text))
        # Check the answer
        while type(answer) != int:
            try:
                answer = int(answer)
            except ValueError:
                print("This is not a valid number. Please try again!")
                answer = input("{} = ".format(question.text))
        # If the answer is right, send back True
        # Otherwise send back False
        if answer == question.answer:
            self.answers.append(True)
            logging.debug("Answer correct")
        else:
            self.answers.append(False)
            logging.debug("Answer wrong")
        # Log the end time
        end_time = datetime.datetime.now()
        # Send back the elapsed time
        elapsed_time = end_time - start_time
        logging.debug("Question was answered in {}".format(elapsed_time))
        return elapsed_time

    def summary(self):
        # How many you got right and the total # of questions, 5/10
        correct_answers = self.answers.count(True)
        print("You answered {}/10 questions correctly!".format(correct_answers))
        # Print the total time for the quiz: 30 seconds!


# Testing time
quiz = Quiz()
quiz.take_quiz()