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