Aptitude - Numbers - Discussion

Discussion :: Numbers - General Questions (Q.No.136)

136. 

Which one of the following can't be the square of natural number ?

[A]. 30976
[B]. 75625
[C]. 28561
[D]. 143642
[E]. None of these

Answer: Option D

Explanation:

The square of a natural number nerver ends in 2.

143642 is not the square of natural number.


Vani Varma said: (Feb 8, 2012)  
The square of a natural no never ends in 2, 3, 7, 8.

Raji said: (Jul 3, 2015)  
Give any example.

Akshay said: (Nov 30, 2015)  
The numbers that have 0, 1, 4, 5, 6 or 9 in their units place may be perfect squares where as the numbers that have 2, 3, 7 or 8 in their units place are never perfect squares.

Adil said: (Dec 18, 2018)  
Thanks @Vani Varma.

Bajrang said: (Mar 28, 2019)  
Thanks @Akshay.

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