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Linda Tate Young

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Remove 5 letters from this sequence (XEOXVPERIENLCFE) to reveal a familiar English word.
NUMBERMANIA: Calculate the number 1010 using numbers [1, 3, 1, 5, 94, 726] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
NUMBERMANIA: Calculate the number 8894 using numbers [9, 9, 5, 5, 74, 897] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Jakob Steiner

Born 18 Mar 1796; died 1 Apr 1863 at age 67.Swiss mathematician who was one of the greatest, contributors to projective geometry. He discovered the Steiner surface which has a double infinity of conic sections on it. The Steiner theorem states that the two pencils by which a conic is projected from two of its points are projectively related. He is also known for the Poncelet-Steiner theorem which shows that only one given circle and a straight edge are required for Euclidean constructions. His work included conic sections and surfaces, the theory of second-degree surfaces and centre-of-gravity problems. He developed the principle of symmetrization (1840-41). In 1848 he ws the first to define various polar curves with respect to a given curve, and introduced the “Steiner Curves.”«

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