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+ By OpenBiz Solutions
You will need to assert whether calculations are right or wrong as fast as you can.
There are 3 levels of difficulty.
Top ten scores for each level of difficulty. Challenge your friends in your phone!
openBiz Solutions commits to provide frequent updates to enhance the application as well as fixing as soon as possible any issues that could arise. Please contact us at firstname.lastname@example.org for any suggestion, issue or bug.
Version 2.3 fixes some minor bugs.
Please, let us know on any improvement you would like to add! Thanks.