Calculate the number 840
NUMBERMANIA: Calculate the number 840 using numbers [8, 6, 8, 5, 99, 164] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 2
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John J. Audubon stampIn 1940, a U.S. 1¢ stamp was issued commemorating John James Audubon. The stamp was one of a series of 35 stamps recognizing Famous Americans, including four other scientists and five inventors. A first day of issue ceremony was held by the Post Office Department in St. Francisville, Louisiana, site of the John J. Audubon State Park. He was a self-taught artist and naturalist who illustrated his ornithological books. He was featured on a second stamp in 1985 as part of the Great Americans series. His bird portraits appeared on four later stamps: Columbia Jay (1963, airmail 1967) Long-billed Curlew (one of the Four Centuries of American Art series,1998) and most recently Tanager Birds (American Treasures series, 27 Jun 2002). |