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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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Archive
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Most recent collections
Advent calendar 2025
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List of all puzzles
Tags
scales
quadrilaterals
integers
crosswords
prime factors
area
people maths
fractions
partitions
sum to infinity
sequences
geometry
powers
digits
calculus
even numbers
shape
sets
triangle numbers
triangles
logic
lines
complex numbers
rugby
polygons
wordplay
range
axes
differentiation
menace
determinants
lists
consecutive numbers
ave
taxicab geometry
polynomials
xor
arrows
trigonometry
dominos
chalkdust crossnumber
numbers
the only crossnumber
quadratics
balancing
clocks
colouring
addition
irreducible numbers
planes
percentages
graphs
integration
rectangles
pascal's triangle
pentagons
speed
averages
decahedra
probabilty
volume
star numbers
time
tournaments
number
christmas
shapes
perfect numbers
consecutive integers
median
albgebra
regular shapes
binary
perimeter
cryptic clues
unit fractions
division
2d shapes
folding tube maps
algebra
geometric means
neighbours
tiling
3d shapes
products
gerrymandering
books
square grids
combinatorics
grids
angles
tangents
palindromes
coins
chess
factors
remainders
floors
geometric mean
expansions
means
symmetry
dodecagons
sport
bases
odd numbers
multiples
functions
multiplication
digital clocks
spheres
cards
doubling
sums
chocolate
probability
indices
money
prime numbers
matrices
square roots
proportion
cube numbers
coordinates
squares
multiplaction squares
elections
dice
cubics
routes
dates
surds
mean
games
parabolas
digital products
cryptic crossnumbers
hexagons
square numbers
advent
ellipses
medians
factorials
circles
crossnumbers
© Matthew Scroggs 2012–2026