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