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Find number abc

If b66c2 - 280a6 = 286a6 find number abc. Multiple solutions may exist.

Correct answers: 31

The first user who solved this task is Nasrin 24 T.

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Yrjo Vaisala

Born 6 Sep 1891; died 21 Jul 1971 at age 79.Finnish meteorologist and astronomer regarded as the "father of space research in Finland," As early as 1946, he had suggested that geodetic triangulation at that time being done with rockets or balloons with onboard flashes could better be accomplished by artificial satellites. By the next year he was talking about artificial satellites being used for solar system exploration. In the 1950's he founded Tuorla Observatory and went on to build a tunnel under the hill at Tuorla Observatory to enable making interference measurements to accurately define the length standard for geodesy. He was outstanding in his ability to produce excellent optics for telescopes. Vaisala, together with Liisa Oterman at Tuorla, outpaced the rest of the world in their discovery of minor planets.«

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