mscroggs.co.uk
mscroggs.co.uk

subscribe

Puzzles

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

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

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

Archive

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