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Contains 10 riddles with mathematical logical principles that entertain

It contains 10 riddles with logical mathematical principles that help you to pass the time in a fun way besides stimulating your neurons and it is a good training for numerical skills.

It includes a qualifier of the answer you give, a pencil so you can do operations on the screen and you can erase what you have written.

I hope it's useful.

Any comments please send an email to: mapferrilacademico2018@gmail.com

If you want more riddles, please comment in the mail.

Best regards to all and thanks.