Yusnier Viera is a Cuban-American mathematician and mental calculator known for his remarkable abilities in mental computation and number theory. He gained attention for his exceptional skills in performing complex calculations rapidly without the use of calculators or pen and paper. Viera has participated in various mental calculation competitions and has set multiple records in this field. Additionally, he has shared his techniques and insights into mental math through books, lectures, and workshops, aiming to inspire others to develop their own mental arithmetic skills.
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