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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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Advent calendar 2024
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books
angles
chess
sets
indices
triangles
pentagons
folding tube maps
spheres
graphs
shape
palindromes
planes
axes
powers
volume
tournaments
unit fractions
ellipses
hexagons
means
consecutive integers
area
taxicab geometry
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determinants
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functions
gerrymandering
grids
floors
cube numbers
prime numbers
number
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doubling
cryptic clues
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integration
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the only crossnumber
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matrices
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colouring
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lines
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star numbers
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integers
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binary
products
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multiples
tiling
rectangles
decahedra
scales
complex numbers
sport
shapes
medians
cryptic crossnumbers
proportion
neighbours
albgebra
geometric means
arrows
calculus
pascal's triangle
advent
trigonometry
ave
consecutive numbers
people maths
crosswords
balancing
quadratics
geometric mean
geometry
rugby
cards
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sum to infinity
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