Question

Which of the following statements is true?

fifty-one point seven is less than fifty-one point seven zero

fifty-one point seven is greater than fifty-one point seven zero

fifty-one point seven equals fifty-one point seven zero

fifty-one point seven is less than five point one seven zero

Answer 1

The third one, note that trailing zeros in the decimal expansion of a real number don't change its value.

Answer 2

It'd help a lot to translate them into numbers if you aren't sure:

fifty-one point seven is less than fifty-one point seven zero
51.7 < 51.70

fifty-one point seven is greater than fifty-one point seven zero
51.7 > 51.70

fifty-one point seven equals fifty-one point seven zero
51.7 = 51.70

fifty-one point seven is less than five point one seven zero
51.7 < 5.170