Learn a little by doing a little
Make an idea click.
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.
0 of 7 challenge types explored at this stage
Keep the discovery going.
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.
Practise by subject and stage.
Find the 22th term of the arithmetic sequence 9, 15, 21, 27, ...
Use Tₙ = a + (n − 1)d to find a specific term in a linear arithmetic sequence.
0 of 4 solved in this round
Featured, challenges & worksheets in Reasoning
Set overlap & Venn totals
Use inclusion-exclusion reasoning to find the total number of members across two overlapping sets.
Conditional probability tables
Calculate conditional probability from subgroup counts and express the result as a simplified fraction.