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Move beyond an answer. Explore visual reasoning puzzles and interactive challenges across all 6 subjects, with instant rule-based verification and step-by-step explanations.
What belongs in each mystery box?
Every mystery box holds the same value. Make the two sides balance.
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Turn a little understanding into a fresh page of practice.
Streaks count different challenges solved consecutively in this session and reset after an incorrect check. Repeating a solved question adds no points. Original rule-based practice. Age bands are guidance, not an assessment or curriculum certification.
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Using the chain rule, differentiate f(x) = (5x + 6)^2 and evaluate f′(2).
Apply the chain rule to differentiate composite power functions f(x) = (ax + b)ⁿ and evaluate at a given x.
0 of 4 solved in this round
Featured, challenges & worksheets in Maths
Pythagoras: hypotenuse
Calculate the hypotenuse of a right-angled triangle from two perpendicular side lengths.
Right-triangle trigonometry (SOHCAHTOA)
Apply sine, cosine and tangent ratios (SOHCAHTOA) in right-angled triangles and simplify to lowest terms.
Circle theorems & cyclic quadrilaterals
Apply circle theorems for the angle at the centre (2× circumference angle) and opposite angles in a cyclic quadrilateral.
Stationary & turning points of curves
Set the first derivative dy/dx = 0 to locate the stationary point or minimum turning value of a quadratic curve.