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Find number abc

If ca661 - 544b8 = ac18a find number abc. Multiple solutions may exist.

Correct answers: 5

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Country with no R

Geography teacher asked if I could name a country with no R in it.
I said, "No way."

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Alfred Lacroix

Died 12 Mar 1948 at age 85 (born 4 Feb 1863).French mineralogist and geologist whose Minéraux des roches (1888; "The Minerals of Rocks"), written with the geologist Albert Michel-Lévy, was a pioneer study of the optical properties of rock-forming minerals. He gave particular attention to minerals connected with volcanic phenomena and igneous rocks, to the effects of metamorphism, and to mineral veins. He pursued his interests in various parts of the world, but notably in the Pyrenees. In his numerous contributions to scientific journals he dealt with the mineralogy and petrology of Madagascar, and published an elaborate and exhaustive volume on the eruptions in Martinique, La Montagna Pelée et ses Éruptions (1904).

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