1019 past contests
Topic 42 · Double-angle tangent identity from a given $\tan a$
Topic 37 · Vertically opposite angles are equal, not supplementary (true/false)
Topic 26 · Simplifying $(x+y)^2-(x-y)^2$
Topic 25 · Solution set of $3x-3\gt15$ for integers $x\lt6$ (null set)
Topic 8 · Solving exponential equations $3^{2n+2}=81$, $5^{3n-2}=625$ and $4^{2n-3}=64$
Topic 25 · Integers with $3x-3\gt15$ and $1\leq x\leq10$
Topic 25 · Integers with $3x-3\gt15$ and $1\lt x\lt10$
Topic 32 · A square pyramid has five vertices (true/false)
Topic 32 · A square pyramid has eight edges (true/false)
Topic 32 · A square pyramid has four triangular faces and one square base (true/false)
Topic 14 · Riddle: a constant function's horizontal graph with a single-element range
Topic 14 · Is $f(x)=2x+1$ neither even nor odd? (true/false)
Topic 14 · Is $f(x)=3x^3-2x$ an odd function? (true/false)
Topic 14 · Is $f(x)=4x^2-5$ an even function? (true/false)
Topic 9 · Counting the significant figures in $350$
Topic 33 · Axes of symmetry of a regular pentagon and other regular polygons
Topic 11 · Translation mapping $(2,4)$ onto $(4,2)$ applied to $a(3,1)$
Topic 40 · Maximum value of $y=5+3\cos(30^\circ-x)$
Topic 40 · Maximum value of $y=5\sin(x+30^\circ)+2$
Topic 40 · Maximum value of $y=2-5\cos(x-30^\circ)$