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