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Advent calendar 2022
1 December
All 2022 advent puzzles
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One of the vertices of a rectangle is at the point \((9, 0)\). The \(x\)-axis and \(y\)-axis are both lines of symmetry of the rectangle.
What is the area of the rectangle?
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The only way this is possible is if the rectangle is this square:
The area of this square is
162
.
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fractions
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christmas
speed
integers
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taxicab geometry
bases
logic
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wordplay
crossnumbers
colouring
square numbers
cards
arrows
consecutive integers
prime factors
products
addition
cryptic crossnumbers
cryptic clues
quadratics
shape
multiplaction squares
volume
symmetry
chocolate
unit fractions
the only crossnumber
triangle numbers
remainders
geometric mean
square grids
dominos
2d shapes
clocks
gerrymandering
indices
means
decahedra
xor
sport
routes
sum to infinity
games
star numbers
money
graphs
expansions
spheres
quadrilaterals
division
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ave
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