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What is the missing number?

MATH PUZZLE: Can you replace the question mark with a number?

Correct answers: 95

The first user who solved this task is Djordje Timotijevic.

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Apples

The children were lined up in the cafeteria of a Catholic elementary school for lunch. At the head of the table was a large pile of apples. The nun made a note, and posted on the apple tray:
"Take only ONE. God is watching."
Moving further along the lunch line, at the other end of the table was a large pile of chocolate chip cookies.
A child had written a note, "Take all you want. God is watching the apples.

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James Nasmyth on the form of lightning

In 1856, James Nasmyth spoke “On the Form of Lightning” on the opening day of the 26th Meeting of the British Association at Cheltenham. He said that he wanted to call attention to the fact that Nature never showed a zig-zag dovetail form of lightning as often portrayed by painters and in other works of art. The true natural form was irregular curved lines, single or branched. He attributed the artists' error to the form of the thunderbolt in the hand of Jupiter, as sculptured by the early Greeks. He thought lightning mostly shot up from the earth to the cloud and often continued from the cloud downwards again to another distant part of the earth. The appearance of the lightning, he conceived, was of a rapidly shooting point of light, leaving on the eye the impression of the path it traced. Animated discussion followed.«[Image upper: artists' dovetail form of lightning. Lower: natural form. Illustrations from the Report of the Annual Meeting (1856).]

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