Question

Which of the following numbers are not perfect squares
324,529,625,6561,5476,4489,400

Answer 1

the answer is fourth number 6561

Answer 2

Step-by-step explanation:

Square from 2 to 10 = 4,9,16,25,36,49,64,81 & 100

from these we can know that a square will end with either 4,9,6,5 or with 1,0 .

so numbers that end with these digits are perfect square and the rest are not a perfect square .