Question

which of the following perfect square are square of even number ? 121, 225, 1296, 6561​

Answer 1

Answer:

we have to leave out 121, 225, 6561 and 4489, leaving only 256, 324, 1296, 5476 and 373758. For each number, use prime factorisation method and make pairs of equal factors. There are no factors that are not paired.

Hence, 256 is a perfect square.

Step-by-step explanation:

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Answer 2

Given :

• The following perfect square are square of even number

• 121, 225, 1296, 6561 .

To find :

• Perfect square .

Solution :

We know ,

The square of even numbers are always even

∴ 256 and 1296 are squares of even numbers

256 = 16² , 1296 = 36²