Question 9 (i) Classify √23 as rational or irrational.
√23 = 4.79583152331...
The number is non-terminating non-recurring. Therefore, it is an irrational number.
Question 1 (i) Classify 2−√5 as rational or irrational.
Question 1 (ii) Classify (3+√23)−√23 as rational or irrational.
Question 9 (ii) Classify √225 as rational or irrational.