Warning: count(): Parameter must be an array or an object that implements Countable in /home/customer/www/thinksteam4girls.org/public_html/wp-content/themes/flair/ebor_framework/metabox/init.php on line 724
Puzzles | ThinkSTEAM

Thinksteam Blog

Empower, Enable, and Encourage Girls to Excel

Four Sevens

October 6, 2015 - Puzzles

As Dudeney shows in the illustration here, it is easy to use four 5s to create a sum that equals 100. He then points out that four 9s would also be fairly easy to do, in the form of 99 + 9/9. Achieving it with…

Read More