mscroggs.co.uk
mscroggs.co.uk

subscribe

Sunday Afternoon Maths LXV

 Posted on 2018-05-13 

Cryptic crossnumber #1

In this puzzle, the clues are written like clues from a cryptic crossword, but the answers are all numbers. You can download a printable pdf of this puzzle here.
1 2
3 4
5

Show answer

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.)

Show answer

Square and cube endings

Source: UKMT 2011 Senior Kangaroo
How many positive two-digit numbers are there whose square and cube both end in the same digit?

Show answer & extension

If you enjoyed these puzzles, check out Advent calendar 2019,
puzzles about differentiation, or a random puzzle.

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

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

Archive

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