Question

Which of these are rational or irrational?

Answer 1

Explanation:

1. 6.4 rational
2. we don't know. It might repeat at some point.
3. -2 rational
4. sqrt(16) = +/-4 which is rational.
5. sqrt(12) is irrational. There's no pattern
6. 12/5 is rational 2.4
7. we don't know. If it repeats then it is rational. The way it looks now, there's no pattern, so call it irrational.