Find number abc
If 7a7bb - 7aab8 = bc7 find number abc. Multiple solutions may exist.Correct answers: 42
The first user who solved this task is Djordje Timotijevic.
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Sir Edward AppletonBorn 6 Sep 1892; died 21 Apr 1965 at age 72. Sir Edward Victor Appleton was an English physicist who wasawardedthe 1947 Nobel Prize for Physics for his discovery of the Appleton layer of the ionosphere. From 1919, he devoted himself to scientific problems in atmospheric physics, using mainly radio techniques. He proved the existence of the ionosphere, and found a layer 60 miles above the ground that reflected radio waves. In 1926, he found another layer 150 miles above ground, higher than the Heaviside Layer, electrically stronger, and able to reflect short waves round the earth. This Appleton layer is a dependable reflector of radio waves and more useful in communication than other ionospheric layers that reflect radio waves sporadically, depending upon temperature and time of day.« |