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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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star numbers
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dominos
elections
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neighbours
fractions
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geometric means
angles
proportion
coins
ellipses
odd numbers
mean
determinants
regular shapes
chocolate
menace
geometric mean
rugby
cryptic crossnumbers
median
geometry
remainders
perfect numbers
medians
grids
2d shapes
complex numbers
factors
surds
volume
square numbers
shapes
tournaments
factorials
binary
ave
indices
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even numbers
sets
probability
expansions
calculus
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square roots
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algebra
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