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

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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.)

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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?

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


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


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