Question 9 (v) Classify 1.101001000100001… as rational or irrational.
1.101001000100001…
Since the number is non-terminating non-repeating, it is an irrational number.
Question 9 (iv) Classify 7.478478....... as rational or irrational.
Question 9 (ii) Classify √225 as rational or irrational.