mscroggs.co.uk
mscroggs.co.uk

subscribe

Advent calendar 2021

23 December

I draw the parabola \(y=x^2\) and mark points on the parabola at \(x=17\) and \(x=-6\). I then draw a straight line connecting these two points.
At which value of \(y\) does this line intercept the \(y\)-axis?

Show answer

Archive

Show me a random puzzle
 Most recent collections 

Advent calendar 2025

Advent calendar 2024

Advent calendar 2023

Advent calendar 2022


List of all puzzles

Tags

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

Archive

Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2026