mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

Complex squares

For which complex numbers, \(z\), are \(\mathrm{Re}(z^2)\) and \(\mathrm{Im}(z^2)\) both positive?

Show answer & extension

i to the power of i

If \(i=\sqrt{-1}\), what is the value of \(i^i\)?

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

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

Archive

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