Question 6

Write the correct answer from the given four options.

Which of the following cannot be a perfect square?

a) 841
b) 529
c) 198
d) All of these

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Solution

We know that, a number ending with digits 2, 3, 7 or 8 can never be a perfect square.
So, 198 cannot be written in the form of a perfect square.

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Question 18

Write the correct answer from the given four options.

Which of the following numbers is not a perfect cube?

a) 216
b) 567
c) 125
d) 343

Question 17

Write the correct answer from the given four options.

A perfect square can never have the following digit in its one's place.

a) 1
b) 8
c) 0
d) 6

Question 13

Write the correct answer from the given four options.

Which of the following numbers is a perfect cube?

a) 243
b) 216
c) 392
d) 8640

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