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Advent calendar 2015
5 December
All 2015 advent puzzles
~
More information
How many different triangles are there with a perimeter of 100 and each side having an integer length?
(different = not rotations or reflections)
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208
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triangles
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2d shapes
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Most recent collections
Advent calendar 2024
Advent calendar 2023
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List of all puzzles
Tags
means
medians
spheres
integration
consecutive integers
axes
odd numbers
chalkdust crossnumber
irreducible numbers
remainders
trigonometry
bases
games
factorials
wordplay
gerrymandering
ellipses
even numbers
folding tube maps
differentiation
polynomials
regular shapes
rectangles
2d shapes
books
arrows
averages
quadratics
doubling
partitions
shapes
tiling
cubics
division
surds
quadrilaterals
median
triangles
consecutive numbers
number
tournaments
ave
palindromes
squares
geometry
lines
menace
dominos
perimeter
numbers grids
cube numbers
cryptic crossnumbers
symmetry
cryptic clues
percentages
binary
angles
area
digital clocks
neighbours
volume
unit fractions
sets
taxicab geometry
fractions
advent
factors
geometric means
functions
grids
powers
circles
dates
pascal's triangle
combinatorics
mean
numbers
balancing
expansions
complex numbers
floors
time
cards
scales
crosswords
tangents
calculus
people maths
speed
matrices
square grids
crossnumbers
money
3d shapes
triangle numbers
sum to infinity
probability
dice
planes
star numbers
coordinates
pentagons
range
chocolate
prime numbers
digits
geometric mean
addition
sport
routes
dodecagons
products
rugby
clocks
indices
hexagons
multiplication
integers
perfect numbers
logic
probabilty
parabolas
decahedra
proportion
colouring
chess
graphs
polygons
square numbers
multiples
coins
digital products
square roots
algebra
the only crossnumber
sums
elections
sequences
determinants
albgebra
christmas
shape
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