Which of the following cannot be perfect square?

(A)1681 (B)1849 (C)2116 (D)1762

2
right..
What I typed is a preliminary test, you must verify further to see whether it is a perfect square.
in this queation, with just tat condition u can conclude tat D is the answer
Works fine for this, but I am talking about other questions which have these digits in their unit's place.
ya

Answers

2014-12-19T21:12:43+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
1762  has 2 in the units digit.  so it cannot be a perfect square.

    unit digits of perfect squares can be only:

       1*1 = 1,    2*2 = 4,     3*3 = 9,      4*4 = 6 ,    5*5 = 5
       6*6 = 6        7*7 = 9      8*8 = 4    9*9 = 1

hence  1,4,6,5,9      are the only digits in the units place in perfect squares.

1 5 1
2014-12-21T14:50:36+05:30
D)1762 is not a perfect square

0