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Find number abc

If 75ab8 - 1ac54 = 5c254 find number abc. Multiple solutions may exist.

Correct answers: 1

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Blind Skydivers

Q: Why don't blind people skydive?

A: It scares the crap out of their seeing-eye dogs.

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Salk vaccine field trial

In 1955, the Salk vaccine against polio was announced to work, and be “safe, effective and potent,” after a year-long field trial. Dr. Thomas Francis, Jr. made the statement at a press conference in Ann Arbor, Michigan, on the tenth annniversary of the death of Franklin Roosevelt (1945), the U.S. president who was a victim of the disease. Dr. Francis was a former professor of Jonas Salk.

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