mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Lots of ones

Is any of the numbers 11, 111, 1111, 11111, ... a square number?

Show answer

What is the sum?

What is \(\displaystyle\frac{1}{\sqrt{1}+\sqrt{2}}+\frac{1}{\sqrt{2}+\sqrt{3}}+...+\frac{1}{\sqrt{15}+\sqrt{16}}\)?

Show answer

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2020