are_relatively_prime

mathtools.are_relatively_prime(numbers_)

Is true when numbers_ is a sequence comprising zero or more numbers, all of which are relatively prime.

>>> mathtools.are_relatively_prime([13, 14, 15])
True

Otherwise false:

>>> mathtools.are_relatively_prime([13, 14, 15, 16])
False

Returns true when numbers_ is an empty sequence:

>>> mathtools.are_relatively_prime([])
True

Returns false when numbers_ is nonsensical type:

>>> mathtools.are_relatively_prime('foo')
False

Returns true or false.