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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
Show me a random puzzle
▼ show ▼
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Most recent collections
Advent calendar 2025
Advent calendar 2024
Advent calendar 2023
Advent calendar 2022
List of all puzzles
Tags
odd numbers
dominos
trigonometry
symmetry
geometric mean
axes
digital clocks
neighbours
lines
sequences
pascal's triangle
christmas
multiplication
folding tube maps
ellipses
2d shapes
angles
wordplay
cards
averages
integers
prime numbers
products
advent
shapes
combinatorics
triangles
factors
rectangles
lists
polygons
tiling
star numbers
quadratics
dodecagons
money
elections
range
parabolas
cryptic clues
coordinates
sums
irreducible numbers
perimeter
perfect numbers
menace
routes
means
pentagons
mean
games
cryptic crossnumbers
cubics
integration
tournaments
spheres
remainders
square grids
regular shapes
people maths
books
digits
proportion
factorials
speed
digital products
albgebra
percentages
the only crossnumber
logic
chocolate
sets
prime factors
doubling
shape
area
planes
chess
decahedra
clocks
differentiation
medians
determinants
geometry
sum to infinity
dates
powers
triangle numbers
gerrymandering
fractions
bases
crosswords
multiples
ave
hexagons
tangents
circles
complex numbers
functions
calculus
consecutive numbers
unit fractions
xor
crossnumbers
geometric means
division
rugby
grids
arrows
sport
consecutive integers
floors
quadrilaterals
probabilty
coins
cube numbers
expansions
square numbers
median
indices
3d shapes
graphs
even numbers
volume
scales
dice
squares
numbers
probability
colouring
multiplaction squares
balancing
polynomials
binary
chalkdust crossnumber
addition
algebra
partitions
matrices
square roots
surds
palindromes
taxicab geometry
time
number
© Matthew Scroggs 2012–2026