An arm and a leg

If 60% of people have lost an eye, 75% an ear, 80% an arm and 85% a leg, what is the least percentage of people that have lost all four?

Show answer

Shooting hoops

Source: Alex Bolton
You spend an afternoon practising throwing a basketball through a hoop.
One hour into the afternoon, you have scored less than 75% of your shots. At the end of the afternoon, you have score more than 75% of your shots.
Is there a point in the afternoon when you had scored exactly 75% of your shots?

Show answer & extension


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


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


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