mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Two

Find \(a\) such that \(a+(a+A)^{-1}=2\), where \(A=(a+A)^{-1}\).
ie. \(a + \frac{1}{a + \frac{1}{a + \frac{1}{a + \frac{1}{...}}}} = 2\).
Find \(b\) such that \(b+(b+B)^{\frac{1}{2}}=2\), where \(B=(b+B)^{\frac{1}{2}}\).
ie. \(b + \sqrt{b + \sqrt{b + \sqrt{b + \sqrt{...}}}} = 2\).
Find \(c\) such that \(c+(c+C)^{2}=2\), where \(C=(c+C)^{2}\).
In terms of \(k\), find \(d\) such that \(d+(d+D)^{k}=2\), where \(D=(d+D)^{k}\).

Show answer & extension

Tags: numbers
If you enjoyed this puzzle, check out Sunday Afternoon Maths VIII,
puzzles about numbers, or a random puzzle.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2025

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022


List of all puzzles

Tags

differentiation chess spheres perfect numbers prime factors multiples unit fractions graphs digital clocks colouring tangents sequences xor integers lists means balancing powers binary trigonometry albgebra 2d shapes calculus circles cubics regular shapes square roots functions chocolate algebra fractions christmas grids crosswords numbers polygons expansions number square grids time advent area star numbers triangle numbers multiplaction squares pentagons shapes lines percentages consecutive numbers parabolas tournaments games quadrilaterals mean scales decahedra doubling addition digital products remainders division clocks coordinates arrows folding tube maps integration quadratics geometric mean crossnumbers probability neighbours rectangles floors factors cards dodecagons median shape planes tiling irreducible numbers people maths perimeter symmetry partitions dominos cryptic clues routes odd numbers palindromes dice pascal's triangle surds hexagons coins sport angles geometric means squares matrices books volume money taxicab geometry factorials consecutive integers elections triangles prime numbers dates ellipses complex numbers cube numbers chalkdust crossnumber 3d shapes square numbers bases gerrymandering axes sums menace ave cryptic crossnumbers sets polynomials speed the only crossnumber range averages sum to infinity combinatorics multiplication geometry medians products wordplay rugby logic proportion probabilty digits even numbers determinants indices

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2026