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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
axes
time
arrows
expansions
dodecagons
floors
cubics
mean
lists
combinatorics
triangle numbers
decahedra
fractions
sequences
perimeter
dates
addition
numbers
quadratics
percentages
hexagons
logic
probability
odd numbers
consecutive numbers
3d shapes
crosswords
division
products
trigonometry
chalkdust crossnumber
geometric means
chess
square roots
powers
doubling
symmetry
algebra
money
cryptic clues
integration
factorials
calculus
2d shapes
square grids
shape
probabilty
parabolas
geometry
tournaments
taxicab geometry
dice
multiplication
consecutive integers
planes
multiplaction squares
gerrymandering
the only crossnumber
coordinates
median
cards
neighbours
irreducible numbers
ave
cryptic crossnumbers
medians
matrices
area
perfect numbers
sums
polygons
shapes
graphs
sport
elections
digits
cube numbers
square numbers
lines
quadrilaterals
people maths
pascal's triangle
crossnumbers
averages
bases
chocolate
colouring
regular shapes
coins
number
routes
tangents
unit fractions
scales
pentagons
differentiation
sets
prime factors
polynomials
grids
multiples
indices
rugby
functions
clocks
palindromes
geometric mean
even numbers
albgebra
proportion
triangles
range
volume
digital products
folding tube maps
xor
integers
dominos
squares
wordplay
tiling
angles
surds
binary
advent
digital clocks
sum to infinity
determinants
spheres
star numbers
complex numbers
menace
ellipses
prime numbers
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christmas
partitions
games
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balancing
factors
© Matthew Scroggs 2012–2026