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

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

Archive

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