input: Write a function to filter odd numbers using lambda function.
  assert filter_oddnumbers([1, 2, 3, 4, 5]) == [1, 3, 5]
  assert filter_oddnumbers([10, 15, 20, 25, 30]) == [15, 25]
  assert filter_oddnumbers([6, 7, 8, 9, 10]) == [7, 9]
output: def filter_oddnumbers(numbers):
      return list(filter(lambda x: x % 2 != 0, numbers))