# Puzzles

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#### Sunday Afternoon Maths LXVII

Coloured weightsNot Roman numerals

#### Advent calendar 2018

#### Sunday Afternoon Maths LXVI

Cryptic crossnumber #2#### Sunday Afternoon Maths LXV

Cryptic crossnumber #1Breaking Chocolate

Square and cube endings

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

You are given a bar of chocolate made up of 15 small blocks arranged in a 3×5 grid.

You want to snap the chocolate bar into 15 individual pieces. What is the fewest number of snaps that you need to break the bar? (One snap consists of picking up one piece of chocolate and snapping it into two pieces.)

If you enjoyed this puzzle, check out Sunday Afternoon Maths LXV,

puzzles about logic, or a random puzzle.

puzzles about logic, or a random puzzle.