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Showing puzzles tagged "pentagons".
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14 December
All 2022 advent puzzles
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Holly draws a line of connected regular pentagons like this:
She continues the pattern until she has drawn 204 pentagons. The perimeter of each pentagon is 5. What is the perimeter of her line of pentagons?
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The two pentagons at the end of the pattern each contribute 4 units to the permimeter. The remaining 202 pentagons each contribute 3 units to the perimeter. This gives a total perimeter of 2×4+202×3=
614
.
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pentagons
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cryptic crossnumbers
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square roots
scales
geometric mean
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triangle numbers
surds
integers
arrows
geometric means
time
spheres
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coins
number
parabolas
range
multiples
dominos
wordplay
people maths
expansions
elections
gerrymandering
money
crossnumbers
routes
shapes
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dodecagons
albgebra
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chalkdust crossnumber
irreducible numbers
grids
prime numbers
division
pentagons
balancing
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