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 

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

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

Archive

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