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I am a food, I have only three letters in my name; Leave the first, I still sound the same. What am I?
NUMBERMANIA: Calculate the number 1968 using numbers [3, 8, 6, 3, 78, 509] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
If 1c216 + 5a259 = 6cb75 find number abc. Multiple solutions may exist.

Frederick Fuller Russell

Born 17 Aug 1870; died 29 Dec 1960 at age 90.American scientist who developed the first successful U.S. typhoid fever vaccine. Russell earned his medical degree in 1893 and was commissed in 1898 as first lieutenant and assistant surgeon in the U.S. Army. In summer 1908, the U.S. Army Surgeon General sent him to Europe to study the experience of the British and German armies in anti-typhoid vaccination. In 1909, Major Russell prepared a laboratory the Army Medical Museum for manufacturing vaccine, and vaccinated volunteers, the first of whom came from the museum and the medical school. By the end of 1910, 10,841 volunteers had been vaccinated. This was made compulsory for military personnel the next year. The reduction in the incidence of the disease was dramatic.«

Boy Scout on the plane

A doctor, a lawyer, a little boy scout and a pastor were out for a Sunday afternoon flight on a small private plane.

Suddenly, the plane developed engine trouble. In spite of the best efforts of the pilot, the plane started to go down.

Finally, the pilot grabbed a parachute, yelled to the passengers that they had better jump, and bailed out.

Unfortunately there were only three parachutes remaining.

The doctor grabbed one and said "I'm a doctor, I save lives, so I must live," and jumped out.

The lawyer then said "I'm the smartest man in the world, I deserve to live!" He grabbed a parachute and jumped, also.

The pastor looked at the little boy scout and said, "My son, I've lived a long and full life. You are young and have your whole life ahead of you. Take the last parachute and live in peace."

The little boy scout handed the parachute back to the pastor and said "Not to worry, Preacher. 'The smartest man in the world' just jumped out with my back pack."

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