Advent calendar 2015

1 December

What is area of the largest area rectangle which will fit in a circle of radius 10?

Show answer


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


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


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