Equation Repair
Find the value that makes an equation true and check it by substitution.
Preparing the activity…
How to play
Apply the same operation to both sides. Substitute your answer into the displayed equation to verify it.
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.