What is wrong with my if statement in this multiplication test generator?

This is a multiplication test generator. When I enter the correct answer, it still displays the message "No. Please try again."

import random

answer = 0

def generate_numbers():
    num1 = random.randrange(0,10)
    num2 = random.randrange(0,10)
    return(num1, num2)

def display_question(answer):
    num1, num2 = numbers
    answer = num1 * num2
    guess = int(input(f'What is {num1} times {num2}?'))
                
    while guess != answer:
        print("No. Please try again")
        display_question()

    print("Very good!")