Question

without doing any calculation,find the number which are surely not perfect squares.
153
257
408
441​

Answer 1

Answer:

Step-by-step explanation:

We know that the ending digit of perfect square is 0, 1, 4, 5, 6, and 9. ∴ A number ending in 2, 3, 7 or 8 can never be a perfect square. ∴ (i) 153, cannot be a perfect square. (ii) 257, cannot be a perfect square