Advent calendar 2020

5 December

Carol rolled a large handful of six-sided dice. The total of all the numbers Carol got was 521. After some calculating, Carol worked out that the probability that of her total being 521 was the same as the probability that her total being 200. How many dice did Carol roll?

Show answer


Show me a random puzzle
 Most recent collections 

Advent calendar 2020

Advent calendar 2019

Sunday Afternoon Maths LXVII

Coloured weights
Not Roman numerals

Advent calendar 2018

List of all puzzles


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


Show me a random puzzle
▼ show ▼
© Matthew Scroggs 2012–2021