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## Comment on

2520k is a Perfect Square## these videos are lifesavers!

## PLZ post question related to

Thank you.

## I typically place related

I typically place related questions under the video that teaches the necessary properties.

To answer the above video questio,n you need to know about some properties of squares of integers.

So, the video lesson "Squares of Integers" (https://www.greenlighttestprep.com/module/gre-integer-properties/video/829) is where you'll find related questions.

Cheers,

Brent

## I do not understand the

Thanks

## But 176,400 IS a perfect

But 176,400 IS a perfect square.

176,400 = 420²

Cheers,

Brent

## I needed to go to bed. I was

## I solved the question by

2520/35= Not a perfect square, 2520/105=not a perfect square,2520/140=not a perfect square, 2520/210= not a perfect square

2520/70= 36( A perfect square)

## That's a perfectly valid

That's a perfectly valid strategy - nice work!!

By DIVIDING each answer choice, you're removing all of the terms that are NOT part of a perfect square, leaving only the perfect squares.

Awesome!!

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