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Advent calendar 2016
14 December
All 2016 advent puzzles
~
More information
In July, I posted the
Combining Multiples
puzzle.
Today's number is the largest number that cannot be written in the form \(27a+17b\), where \(a\) and \(b\) are positive integers (or 0).
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415
Tags:
numbers
,
factors
,
multiples
,
sums
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Most recent collections
Advent calendar 2025
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List of all puzzles
Tags
triangles
median
sum to infinity
division
matrices
squares
differentiation
perfect numbers
folding tube maps
expansions
sport
colouring
balancing
even numbers
calculus
crosswords
axes
time
means
routes
decahedra
the only crossnumber
albgebra
consecutive numbers
2d shapes
tangents
partitions
lines
proportion
regular shapes
polynomials
coordinates
clocks
xor
factors
pascal's triangle
pentagons
functions
combinatorics
planes
determinants
unit fractions
chess
remainders
polygons
area
floors
taxicab geometry
products
sets
binary
complex numbers
tournaments
cube numbers
rectangles
range
arrows
lists
numbers
dates
scales
odd numbers
digital products
grids
cubics
quadratics
square roots
triangle numbers
addition
factorials
logic
number
medians
speed
sums
cryptic crossnumbers
tiling
percentages
digital clocks
quadrilaterals
square numbers
prime numbers
cryptic clues
dominos
indices
menace
angles
multiples
irreducible numbers
powers
money
elections
probability
gerrymandering
circles
shapes
wordplay
spheres
prime factors
graphs
mean
geometric means
books
integration
dodecagons
palindromes
cards
3d shapes
integers
probabilty
geometry
crossnumbers
fractions
square grids
advent
chalkdust crossnumber
averages
parabolas
algebra
people maths
multiplaction squares
ave
hexagons
perimeter
trigonometry
dice
chocolate
rugby
ellipses
surds
digits
star numbers
volume
games
bases
multiplication
doubling
symmetry
consecutive integers
coins
geometric mean
neighbours
christmas
sequences
shape
© Matthew Scroggs 2012–2026