Replace the question mark with a numberMATH PUZZLE: Can you replace the question mark with a number?
Correct answers: 61
The first user who solved this task is Eugenio G. F. de Kereki.
#brainteasers #math #riddles
Joseph LeidyDied 30 Apr 1891 at age 67 (born 9 Sep 1823).American zoologist who made significant contributions in a remarkably wide range of earth and natural science disciplines, including comparative anatomy, parasitology, and paleontology. As the Father of American Vertibrate Paleontology, he described not only the first relatively complete dinosaur skeleton, but the diversity of fossil finds in the American West. His knowledge of comparative anatomy enabled him to make sense of even fragmentary fossil remains. He was also a competant microscopist, scientific illustrator, and published papers in human biology and medicine. His microscopic examination of parasite cysts in cooked ham and microorganisms in housefly mouthparts enabled him to improve public heath.«