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Advent calendar 2021
23 December
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I draw the parabola \(y=x^2\) and mark points on the parabola at \(x=17\) and \(x=-6\). I then draw a straight line connecting these two points.
At which value of \(y\) does this line intercept the \(y\)-axis?
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The line will meet the \(y\)-axis at y=
102
.
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List of all puzzles
Tags
tangents
axes
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chess
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odd numbers
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planes
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percentages
2d shapes
regular shapes
addition
cryptic crossnumbers
advent
expansions
rugby
number
shapes
dice
averages
pentagons
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cube numbers
volume
perfect numbers
digits
dodecagons
elections
coordinates
doubling
sport
irreducible numbers
rectangles
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folding tube maps
surds
chalkdust crossnumber
sum to infinity
functions
division
cryptic clues
means
even numbers
books
angles
coins
tiling
crosswords
christmas
matrices
digital products
proportion
parabolas
complex numbers
integration
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scales
star numbers
people maths
indices
clocks
symmetry
binary
area
median
3d shapes
consecutive integers
probabilty
chocolate
crossnumbers
dominos
triangle numbers
logic
tournaments
wordplay
crossnumber
floors
sets
circles
range
time
spheres
taxicab geometry
fractions
prime numbers
decahedra
remainders
bases
geometric means
speed
polygons
gerrymandering
differentiation
the only crossnumber
factorials
factors
triangles
cubics
quadratics
pascal's triangle
hexagons
graphs
money
combinatorics
mean
perimeter
numbers
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menace
square numbers
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