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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 2023
Advent calendar 2022
Advent calendar 2021
Advent calendar 2020
List of all puzzles
Tags
crossnumbers
perfect numbers
division
colouring
surds
rectangles
sum to infinity
spheres
indices
symmetry
median
partitions
advent
geometric means
doubling
balancing
remainders
irreducible numbers
time
factorials
multiples
wordplay
bases
triangle numbers
shapes
polygons
folding tube maps
cryptic clues
routes
coordinates
pascal's triangle
numbers
graphs
number
unit fractions
chocolate
sets
percentages
determinants
dates
probability
cubics
2d shapes
digits
integers
angles
consecutive integers
parabolas
binary
area
perimeter
crosswords
products
digital clocks
dodecagons
geometric mean
geometry
floors
games
pentagons
differentiation
shape
cards
even numbers
elections
algebra
tournaments
tiling
circles
probabilty
lines
functions
money
sequences
triangles
the only crossnumber
grids
squares
square numbers
regular shapes
taxicab geometry
sport
range
chalkdust crossnumber
decahedra
digital products
books
factors
cube numbers
fractions
coins
axes
addition
consecutive numbers
speed
quadrilaterals
dice
averages
rugby
quadratics
star numbers
hexagons
people maths
trigonometry
cryptic crossnumbers
crossnumber
planes
matrices
ellipses
clocks
sums
calculus
tangents
logic
3d shapes
albgebra
expansions
menace
means
volume
chess
combinatorics
scales
odd numbers
integration
multiplication
proportion
arrows
ave
polynomials
complex numbers
mean
square roots
palindromes
dominos
christmas
prime numbers
gerrymandering
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