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