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Linear and nonlinear models for national health expenditures in the USA

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 18 June 2018, pp. 193197

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Blocks of decimal digits

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 18 June 2018, pp. 198202

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All parabolas through three noncollinear points

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 18 June 2018, pp. 203209

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Rational arc length

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 18 June 2018, pp. 210225

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Can our coinage system be improved?

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 18 June 2018, pp. 226232

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Tethering in pastures new

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 18 June 2018, pp. 233245

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From dawn to dusk

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 18 June 2018, pp. 246256

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The existence of triangles, tetrahedra, and higherdimensional simplices with prescribed exradii

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 18 June 2018, pp. 257263

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Metric relations in crossed trapezia

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 18 June 2018, pp. 264269

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Central force fields and Kepler's laws

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 18 June 2018, pp. 270279

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The seven circles theorem revisited

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 18 June 2018, pp. 280301

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Other
Growing The Gazette

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 18 June 2018, p. 301

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Matter for Debate
The importance of characterisations in geometry

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 18 June 2018, pp. 302307

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Notes
102.20 The sum of the first n cubes is a square – two Proofs without Words

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 18 June 2018, p. 308

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102.21 An addendum to Estermann's proof of the irrationality of

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 18 June 2018, pp. 308309

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102.22 Proof without Words: sums of sums of factorials is one less than a factorial: inductive step

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 18 June 2018, pp. 309310

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102.23 A visual proof that is irrational

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 18 June 2018, pp. 311312

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102.24 Area of a circle via the Fundamental Theorem of Calculus

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 18 June 2018, pp. 312314

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102.25 On an alternative formula for the area of a spherical cap

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 18 June 2018, pp. 314316

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102.26 An ad hoc limiting process

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 18 June 2018, p. 317

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