Chart Detective
Read small data tables and compare totals, differences and changes.
Preparing the activity…
How to play
Use the labelled values. A larger number is not necessarily a larger percentage change. There is no time limit.
Use the feedback
Attempt an answer before looking at a hint or explanation. If it differs from the expected answer, compare the reasoning one step at a time. For a number problem, substitute your result back into the question. For a passage, point to the words that support your interpretation.
About this activity
This activity provides ten short generated questions in a session. Values change across rounds; repeated rounds use the same task family. There is no timer or competitive ranking. Correct-answer counts describe this task only.
Some puzzles can have more than one valid solution; grid checks accept any solution that meets the displayed constraints. Hints follow a known example solution. Familiarity, hints and previous attempts affect performance.
Keep exploring
Explore the original brain games · Learning guides
Original examples and code created with AI assistance. No IQ, diagnostic or therapeutic interpretation is provided.