Math Quiz
Description
The following program runs a math quiz consisting of 10 multiplication
problems involving operands between 1 and 10:
from random import randint
correct = 0
for i in range(10):
n1 = randint(1, 10)
n2 = randint(1, 10)
prod = n1 * n2
ans = input("What's %d times %d? " % (n1, n2))
if ans == prod:
print "That's right  well done.\n"
correct = correct + 1
else:
print "No, I'm afraid the answer is %d.\n" % prod
print "\nI asked you 10 questions. You got %d of them right." % correct
print "Well done!"
Your mission will be to do the following:
 Modify the program so that the user can choose how many questions
they will be asked.
 Add levels to the program:
 Beginner  with operands between 1 and 10
 Intermediate  with operands between 1 and 25
 Advanced  with operands between 1 and 100
 Modify the message at the end so that it says:
Well done! : if the user answered more than 2/3 of the
questions correctly.
You need more practice : if they get between 1/3 and 2/3 of
the questions correct.
Please ask your math teacher for help! : if they get less
than 1/3 of the questions correct.
 Allow the user to start another quiz without restarting the program.
 Let the user choose the question type: addition, subtraction,
multiplication, or mixed.
Extra for Experts:
 Add division as a question type, but
only generate questions which have integral solutions.
 Maintain session totals for each type of question (the total
number of questions, and the total answered correctly; the total
number of addition, subtraction, multiplication, and division
questions and the total correct for each of these question types).
