25 x 25 Grid, find how many shaded squares

Attachment 4623 (http://mathhelpboards.com/attachment.php?attachmentid=4623)

pls help with the formula on solving these the easy way.
It took…

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s