Show me a random puzzle
 Most recent collections 


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


Show me a random puzzle
▼ show ▼

An integral

Permanent link to this puzzle:
Source: Alex Bolton (inspired by Book Proofs blog)
What is

Show hint

Show answer & extension

© Matthew Scroggs 2019