input: Write a function to generate an even number between 10 and 200 that is divisible by 5. If the given number is not even or not divisible by 5, increment the number and check again.
  
  assert generate_even_number() >= 10
  assert generate_even_number() % 2 == 0
  assert generate_even_number() % 5 == 0
  assert generate_even_number() <= 200
output: def generate_even_number():
      num = 10
      while num <= 200:
          if num % 2 == 0 and num % 5 == 0:
              return num
          num += 1
      return None