Question

Which of the following is NOT a rational number?
A. 2.468
B. .89236054…….
C. 4/9
D. .131313…

Answer 1

A rational number is a number which can be written in the form (p/q) for coprime integers p, q.

C is obvious.
A is (sort of) obvious.
D - do you know/remember how to convert recurring decimals into fractions?

B is an interesting one, and why I take issue with this question. It's clearly the one you are 'meant' to pick, but there is no evidence it is not rational; some rational numbers take FAR longer than that to start repeating. I'd have picked something for which this property can be proved, i.e. sqrt(2), pi, e...

Answer 2

Determine which number is the larger in the given pair of numbers. -4, -23

Answer 3

You're welcome.

Answer 4

thank you!

Answer 5

please help