Question

1. Which of the following natural numbers are perfect squares? Give reasons in support of your answer.

(i)729
(ii) 5488
(iv) 243
( v)1024


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Answer 1

Answer:

i)729 is a perfect square because its unit digit is 9 which is square of 3... 729 is square of 27

ii) not a perfect square because unit digits of perfect square cannot be 8

iii) 243 is not a perfect square because unit digits of perfect square cannot be 3

iv) yes.. because unit digit is 4 which is square of 2...1024 is square of 32