Federico Ludueña
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Coauthors: Greg Arce
If you are Federico Ludueña, a family member, or friend, and you would like to claim and edit this author page, please do the following:
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Coauthors: Greg Arce

You may be familiar with the technique to cast out 9s, which is used for some mathematical-based magic tricks (see, for example, Martin Gardner, Harry Lorayne, or Arthur Benjamin). Federico Ludueña shares his thoughts and extensions to this method, and in particular, he expands the method to casting out 10s, which is faster.
1st edition 2026, PDF 10 pages.

The Freestyle Book Test is a powerful book test that you can make at home, with practically any book.
"This book test is unlike any other I have seen." - David Regal (review in Genii magazine)
"Wow, very, very impressive. I like the way so much information can be divulged, this info on the mnemonics certainly applies to many, many effects. I am guessing that even if someone does not use the book test, they will walk away with something from this. Good stuff." - Banachek
You display a book that you say you've had for a long time and have even written and doodled inside of it. Throughout the...

Providing the weekday for a given date has never been easier. Day For Any Date for the Million selects ideas from different methods to achieve a synthesis that renders a difficult process absolutely simple. The inclusion of a prop that can be accommodated on the back of a business card does away with the cumbersome and numerous steps that were usually necessary.
"The Day For Any Date is a classic effect that warrants the best methods available. Federico provides them with an innovative prop and clear instructions on how to succeed with accuracy, quickness and ease. The result is a comfort...