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What is the father doing now?

The mother is 21 years older than the son, and in 6 years time she will be 5 times as old as the son. What is the father doing now?

Correct answers: 18

The first user who solved this task is Sanja Šabović.

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Titanic

Q: What do you get if you cross the atlantic with the titanic?

A: About halfway.

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Flashbulb patented

In 1930, Johann Ostermeyer of Athegnenber, Germany, patented his "Improvements in flash lights used for photographic purposes." (UK patent 324,578). The modern photographic safety flash bulb evolved from this design, which used aluminium wire or foil in oxygen. Unfortunately, all too frequently, these versions exploded! The flashbulb was introduced to the American market in 1930 by General Electric. Flash cubes came along in 1966, and the percussively ignitable "Magicube" in 1970.

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