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Advent calendar 2016
15 December
All 2016 advent puzzles
~
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A book has 386 pages. What do the page numbers on the two middle pages add up to?
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387
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Most recent collections
Advent calendar 2025
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List of all puzzles
Tags
people maths
probability
scales
sums
quadratics
chocolate
matrices
spheres
integration
menace
rectangles
numbers
crossnumbers
bases
time
sequences
coordinates
number
percentages
binary
partitions
digits
fractions
christmas
ave
geometric mean
geometry
cards
cube numbers
symmetry
remainders
gerrymandering
multiples
cubics
perfect numbers
arrows
tiling
powers
means
square numbers
sum to infinity
square grids
algebra
star numbers
money
floors
combinatorics
shapes
tournaments
advent
tangents
cryptic crossnumbers
rugby
triangles
addition
medians
quadrilaterals
polygons
odd numbers
pentagons
functions
area
volume
parabolas
sets
digital clocks
digital products
lists
taxicab geometry
lines
neighbours
wordplay
factors
consecutive numbers
prime numbers
dates
speed
division
determinants
square roots
dodecagons
trigonometry
dice
albgebra
cryptic clues
grids
folding tube maps
palindromes
planes
differentiation
squares
regular shapes
the only crossnumber
3d shapes
multiplaction squares
unit fractions
circles
triangle numbers
expansions
ellipses
clocks
logic
prime factors
balancing
averages
axes
dominos
geometric means
sport
calculus
polynomials
products
coins
books
irreducible numbers
elections
hexagons
pascal's triangle
proportion
doubling
median
factorials
perimeter
even numbers
routes
indices
angles
2d shapes
chalkdust crossnumber
games
shape
crosswords
mean
xor
integers
colouring
consecutive integers
probabilty
range
graphs
surds
chess
multiplication
decahedra
complex numbers
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