Sub-topic 1
2025 · National One-Eighth
Free
Locus of points defined by abscissa and ordinate conditions (true/false)
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Sub-topic 2
2025 · National One-Eighth
Premium
Locus of points defined by distance and coordinate-sum conditions such as $x=3$, $x+y=15$ (true/false)
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Sub-topic 3
2024 · National Preliminary
Premium
Locus of $p(x,y)$ when $a=x\mathbf{i}+y\mathbf{j}$ and $b=x\mathbf{i}-y\mathbf{j}$ are perpendicular
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Sub-topic 4
2024 · National One-Eighth
Premium
Locus of a point equidistant from $a(1,2)$ and $b(-2,1)$
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Sub-topic 5
2023 · National Final
Premium
Locus of a point equidistant from $a(0,5)$ and the $x$-axis
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