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9. Classify the following numbers as rational or irrational :
i)\(\sqrt{23}\)
ii)\(\sqrt{225}\)
iii) 0.3796
iv)sqrt7.478478.....
v)1.101001000100001.....
Answer :

i) Irrational (Since, it is not a perfect square).

ii)Rational (Since, it is a perfect square).

iii)0.3796 = Rational (terminating)

iv) 7.478478… = Rational (non-terminating repeating.)

v)1.101001000100001… = Irrational (non-terminating non-repeating.)