Contents
Notes
105.23 Visual proofs of x3 + y3 = (x + y)(x2 - xy + y2) and x3 - y3 = (x - y)(x2 + xy + y2)
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- 21 June 2021, pp. 303-305
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105.24 Conditional 2 × 2 matrices with three prime elements and given determinant
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- 21 June 2021, pp. 305-306
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105.25 Families of curves orthogonal to the lines y = mx − 2m − m3
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- 21 June 2021, pp. 306-309
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105.26 Areas above and below a curve
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- 21 June 2021, pp. 309-311
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105.27 A remark on
$\mathop {\lim }\limits_{n \to \infty } \sqrt[{p_n}]{{{p_1}{p_2}...{p_n}}} = e$
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- 21 June 2021, pp. 311-312
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105.28 Periodic Möbius sequences
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- 21 June 2021, pp. 312-318
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105.29 A geometric memory
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- 21 June 2021, pp. 318-323
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105.30 A Cinderella theorem in circle geometry
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- 21 June 2021, pp. 323-327
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105.31 On the Brocard disc
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- 21 June 2021, pp. 327-328
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105.32 The side-angle duality in geometry: a direct proof of sufficiency of a cyclic quadrilateral theorem
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- 21 June 2021, pp. 329-331
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105.33 A property of bifocal conics, illuminated by Ptolemy’s theorem
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- 21 June 2021, pp. 331-332
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105.34 The difference between k-gonal numbers with (2n − 1) sides and (n − 1) sides is (3k − 4)-gonal
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- 21 June 2021, pp. 333-334
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105.35 Reconciling remainders in Maclaurin expansions
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- 21 June 2021, pp. 334-338
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105.36 New error analyses for some old mensuration formulae
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- 21 June 2021, pp. 339-343
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105.37 A Potter's brief
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- 21 June 2021, pp. 343-348
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Other
1933 Cumulative Index
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- 21 June 2021, p. 348
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Teaching Notes
Learning from a mistake
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- 21 June 2021, p. 349
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An instructive question
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- 21 June 2021, pp. 350-353
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Other
On ‘A family of discrete spirals’
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- 21 June 2021, pp. 354-355
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On 105.13
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- 21 June 2021, p. 355
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