mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Colliding parallel people

If two people stand 1km apart and walk in the same direction, how far will the have to walk until they collide due to the curvature of the Earth? (diameter of Earth = 12,742km)

Show answer & extension

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

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

Archive

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