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Advent calendar 2016
1 December
All 2016 advent puzzles
~
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One of the digits of today's number was removed to leave a two digit number. This two digit number was added to today's number. The result was 619.
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563
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pentagons
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prime numbers
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routes
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xor
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books
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axes
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floors
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gerrymandering
christmas
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sequences
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area
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shapes
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cards
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ave
averages
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bases
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median
angles
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dice
remainders
odd numbers
volume
powers
division
balancing
addition
integers
triangle numbers
symmetry
mean
logic
taxicab geometry
polynomials
wordplay
squares
shape
elections
sport
people maths
medians
coordinates
means
binary
chess
determinants
cryptic clues
regular shapes
rugby
unit fractions
spheres
integration
partitions
square grids
tiling
perimeter
number
neighbours
surds
lists
doubling
sum to infinity
folding tube maps
calculus
products
graphs
functions
colouring
hexagons
cubics
arrows
range
cryptic crossnumbers
multiples
quadrilaterals
ellipses
parabolas
sets
grids
tangents
circles
digital products
menace
crosswords
time
triangles
fractions
planes
lines
geometry
multiplication
differentiation
consecutive integers
square roots
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