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