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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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rectangles
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consecutive integers
proportion
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bases
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even numbers
the only crossnumber
surds
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triangle numbers
numbers
dominos
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people maths
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pascal's triangle
geometric means
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lines
spheres
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arrows
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matrices
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perfect numbers
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doubling
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angles
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Archive
Show me a random puzzle
▼ show ▼
▲ hide ▲
Most recent collections
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
Advent calendar 2021
List of all puzzles
Tags
cubics
albgebra
polynomials
digital products
cards
doubling
2d shapes
ellipses
square grids
money
partitions
axes
calculus
integers
binary
perfect numbers
regular shapes
consecutive numbers
ave
factorials
rectangles
digital clocks
determinants
geometric mean
cryptic crossnumbers
even numbers
bases
complex numbers
square numbers
coins
wordplay
multiples
logic
sums
advent
factors
consecutive integers
remainders
geometric means
triangle numbers
odd numbers
games
integration
chocolate
division
triangles
proportion
dates
neighbours
shapes
powers
graphs
parabolas
pentagons
tangents
dodecagons
probabilty
sequences
tiling
palindromes
chess
angles
combinatorics
square roots
scales
hexagons
prime numbers
balancing
probability
elections
planes
addition
tournaments
crossnumbers
trigonometry
arrows
functions
coordinates
expansions
algebra
people maths
fractions
medians
sum to infinity
time
symmetry
pascal's triangle
star numbers
dominos
speed
surds
means
area
averages
gerrymandering
the only crossnumber
numbers
mean
clocks
percentages
routes
lines
digits
products
crossnumber
shape
3d shapes
folding tube maps
cube numbers
rugby
perimeter
christmas
floors
geometry
sport
books
number
squares
median
chalkdust crossnumber
quadratics
numbers grids
crosswords
grids
matrices
range
differentiation
multiplication
cryptic clues
colouring
taxicab geometry
menace
circles
polygons
decahedra
dice
irreducible numbers
unit fractions
volume
indices
sets
spheres
quadrilaterals
© Matthew Scroggs 2012–2025