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Calculate the number 821

NUMBERMANIA: Calculate the number 821 using numbers [1, 4, 4, 1, 25, 795] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 21

The first user who solved this task is Thinh Ddh.

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Joseph Wolpe

Born 20 Apr 1915; died 4 Dec 1997 at age 82.South African-born American psychotherapist who helped usher in cognitive behavioral therapy during the 1960s; he devised a treatment to help desensitize patients with phobias by exposing them to their fears incrementally. He worked on systematic desensitization with a methodology designed to treat people with extreme anxiety about specific events, situations, things, or people. His approach involved developing a hierarchy of anxiety-provoking situations, learning relaxation techniques, then associating these situations with relaxation, beginning at the bottom, or least anxiety-provoking, part of the hierarchy. He founded the Association for Advancement of Behaviour Therapy and the Journal of Behavior Therapy.

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