Q2 of 54 Page 68

Which of the following numbers is a perfect cube?

Having prime factors of all the numbers we get,


=



4 (not a perfect cube)




















11



1331



11



121



11



11




1



=



(perfect cube)


=




(not a perfect cube)


= no prime factors are possible


Hence, only case of 1331 a perfect triplet pair of 11’s is formed, Hence 1331 is a perfect cube.

More from this chapter

All 54 →
18

Evaluate:

 1

Which of the following number is a perfect cube?

 3

4