foo.rb

puts "Welcome to a math quiz! "
puts "Lets start! "

counter = 0

puts "What is 2 + 2? "
user_input = gets.chomp.to_i
if user_input == 4
	counter += 1
	puts "Correct answer! "
elsif 
	puts "Wrong answer! "
end
 
puts "What its 3 x 3? "
user_input1 = gets.chomp.to_i
if user_input1 == 9
	counter += 1
	puts "Correct answer! "
elsif 
	puts "Wrong answer! "
end
 
puts "What is 4**3"
user_input2 = gets.chomp.to_i
if user_input2 == 64
	counter += 1
	puts "Correct answer! "
elsif 
	puts "Wrong answer! "
end
 
puts "Whats 225 / 5? "
user_input3 = gets.chomp.to_i
if user_input3 == 45
	counter += 1
	puts "Correct answer! "
elsif 
	puts "Wrong answer! "
end

puts "total correct answers: #{counter}"