1019 past contests
Topic 9 · Riddle: a two-digit even number with prime digits differing by $5$
Topic 35 · A parallelogram with two adjacent equal sides is a rhombus (true/false)
Topic 35 · A square is a rectangle (true/false)
Topic 35 · A parallelogram with a right angle need not be a square (true/false)
Topic 42 · Co-function identity $\cos(90^\circ-a)=\sin a$ (true/false)
Topic 42 · Co-function identity $\sin(90^\circ+a)=\cos a$ (true/false)
Topic 42 · Co-function identity $\cos(90^\circ+a)=-\sin a$ (true/false)
Topic 32 · Map scale when $15$ km is represented by $3$ cm on the map
Topic 11 · Identifying the transformation $(x,y)\mapsto(-x,y)$
Topic 9 · Finding the next prime number after $173$
Topic 25 · Ratio $x:y$ from $\dfrac{2x-y}{3}=\dfrac{x+2y}{5}$
Topic 25 · Ratio $x:y$ from $\dfrac{x+3y}{5}=\dfrac{x+y}{2}$
Topic 25 · Ratio $x:y$ from $\dfrac{x-y}{2}=\dfrac{x+y}{3}$
Topic 26 · Remainder of $2x^3+7x^2+8x-16$ divided by $x-1$
Topic 26 · Remainder of $3x^3+10x^2-7x+6$ divided by $x+1$
Topic 26 · Remainder of $x^3-6x^2+3x-2$ divided by $x-2$
Topic 33 · The capital letter $w$ has one vertical axis of symmetry (true/false)
Topic 33 · The capital letter $h$ has two axes of symmetry (true/false)
Topic 4 · Riddle: the second quartile (median) dividing data into two equal halves
Topic 33 · The capital letter $a$ has one axis of symmetry (true/false)