mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Ellipses

A piece of string 10cm long is tied to two pins 6cm apart. The string is used to draw an ellipse. The pins are then moved 2cm further apart and a second ellipse is drawn. Which ellipse has the larger area?

Show answer & extension

Archive

Show me a random puzzle
 Most recent collections 

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

Sunday Afternoon Maths LXVI

Cryptic crossnumber #2

Sunday Afternoon Maths LXV

Cryptic crossnumber #1
Breaking Chocolate
Square and cube endings

List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2019