mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

2 December

What is the maximum number of lines that can be formed by the intersection of 30 planes?

Two lines

Let A and B be two straight lines such that the gradient of A is the y-intercept of B and the y-intercept of A is the gradient of B (the gradient and y-intercept of A are not the same). What are the co-ordinates of the point where the lines meet?

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

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

Archive

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