1019 past contests
Topic 13 · Constant sequence with $u_n=2u_{n-1}+3$
Topic 19 · Solution set of $x^2-3x-10\lt0$
Topic 19 · Solution set of $x^2-7x+12\gt0$
Topic 14 · Inverse of $y=\dfrac{2x+1}{x-1}$
Topic 19 · Solution set of $x^2+2x-15\gt0$
Topic 14 · True or false: every mapping (function) is a one-to-one relation
Topic 14 · True or false: a many-to-one relation is a mapping (function)
Topic 14 · Inverse of $y=\dfrac{2x+1}{x+2}$
Topic 14 · Inverse of $y=\dfrac{x-2}{2x+3}$
Topic 32 · Riddles: vertex, apex, base and edge
Topic 14 · True or false: a many-to-many relation is a mapping (function)
Topic 38 · Does $\sin^{-1}(0)$ equal $\cos^{-1}(1)$? (true/false)
Topic 38 · Does $\sin^{-1}(0.5)$ equal $\cos^{-1}(0.5)$? (true/false)
Topic 38 · Does $\sin^{-1}(1)$ equal $\cos^{-1}(0)$? (true/false)
Topic 34 · Riddles: quadrilaterals such as the isosceles trapezium, kite and rhombus
Topic 43 · Is the centre of $x^2+y^2-2x+4y=0$ equal to $(1,-2)$? (true/false)
Topic 43 · Is the centre of $x^2+y^2-2x+4y=0$ equal to $(2,-4)$? (true/false)
Topic 40 · Does $y=\sin(2x)$ have a maximum at $x=\dfrac{\pi}{2}$? (true/false)
Topic 40 · Does $y=\cos(2x)$ have a maximum at $x=\pi$? (true/false)
Topic 40 · Does $y=\cos(x)$ have a minimum at $x=\dfrac{\pi}{2}$? (true/false)