ArchiveShow me a random puzzle
Most recent collections
Sunday Afternoon Maths LXVIIColoured weights
Not Roman numerals
Advent calendar 2018
Sunday Afternoon Maths LXVICryptic crossnumber #2
Sunday Afternoon Maths LXVCryptic crossnumber #1
Square and cube endings
List of all puzzles
Tagsfloors sequences integers spheres square roots 2d shapes money prime numbers ave mean partitions perimeter fractions dodecagons unit fractions angles probabilty coordinates chess parabolas triangle numbers algebra balancing shapes bases scales trigonometry logic chocolate perfect numbers remainders averages doubling graphs factorials coins division dice wordplay area speed symmetry cryptic crossnumbers routes squares numbers multiplication square numbers cards 3d shapes cryptic clues regular shapes multiples proportion rugby integration crossnumbers triangles irreducible numbers quadratics people maths star numbers crosswords complex numbers books number lines clocks digits folding tube maps arrows menace addition ellipses grids cube numbers palindromes taxicab geometry rectangles advent games colouring calculus percentages differentiation sport odd numbers functions sums indices planes sum to infinity shape christmas polygons circles factors chalkdust crossnumber volume hexagons pascal's triangle time surds probability means dates geometry
You start at A and are allow to walk left, right, up or down along the grid. The grid continues forever in every direction. After you have walked thirteen units, how many different locations could you be in?
You start at A and are allowed to move either to the right or upwards.
How many different routes are there to get from A to B?