1019 past contests
Topic 27 · $\dfrac{dy}{dx}$ of $2x^2+xy+y^2=15$ (implicit differentiation)
Topic 27 · $\dfrac{dy}{dx}$ of $x^2+2xy+3y^2=10$ (implicit differentiation)
Topic 27 · $\dfrac{dy}{dx}$ of $x^2-xy-y^2=20$ (implicit differentiation)
Topic 41 · Area of a triangle from two sides and the included angle, $\text{area}=\dfrac12ab\sin\theta$
Topic 26 · Factorising $5x^2-4xy-12y^2$
Topic 21 · Solution set of $|5x-15|\lt30$
Topic 47 · Intercepts of $\dfrac{x^2}{16}+\dfrac{y^2}{9}=1$, $4x^2+y^2=100$ and $x^2-y^2=9$
Topic 25 · Proportion $\dfrac{3}{4x+3}=\dfrac{4}{2x+5}$
Topic 25 · Proportion $\dfrac{5}{x+4}=\dfrac{3}{x-2}$
Topic 25 · Proportion $\dfrac{6}{x-5}=\dfrac{6}{5-x}$ with no solution
Topic 14 · Domain of $f(x)=\dfrac{\sqrt{x-2}}{x}$
Topic 14 · Domain of $f(x)=\dfrac{3}{\sqrt{x-5}}$
Topic 14 · Domain of $f(x)=\sqrt{x^2-6x}$
Topic 19 · Riddle: a three-digit number built from the roots of $x^2-3x+5=0$
Topic 35 · A trapezium is not a parallelogram (true/false)
Topic 34 · A rhombus with congruent diagonals is a square (true/false)
Topic 34 · A parallelogram with congruent diagonals is a rectangle (true/false)
Topic 42 · Double-angle tangent identity from a given $\tan a$
Topic 13 · Next term of $1,\ 2,\ 4,\ 7,\ 11,\ \ldots$
Topic 37 · Vertically opposite angles are equal, not supplementary (true/false)