Which one of the following can't be the square of natural number ? Choose the correct option:
A) 20164
B) 32761
C) 42437
D) 81225
E) None of these
The square of a natural number never ends in 7.   42437 is not the square of a natural number.   ANSWER :42437
<result>C</result>
Which one of the following can't be the square of natural number ?