mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Odd sums

What is \(\frac{1+3}{5+7}\)?
What is \(\frac{1+3+5}{7+9+11}\)?
What is \(\frac{1+3+5+7}{9+11+13+15}\)?
What is \(\frac{1+3+5+7+9}{11+13+15+17+19}\)?
What is \(\frac{\mathrm{sum\ of\ the\ first\ }n\mathrm{\ odd\ numbers}}{\mathrm{sum\ of\ the\ next\ }n\mathrm{\ odd\ numbers}}\)?

Show answer & extension

If you enjoyed this puzzle, check out Sunday Afternoon Maths V,
puzzles about odd numbers, or a random puzzle.

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022

Advent calendar 2021


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2025