Free Mistake Finder
Algebra Mistake Finder
Find whether the algebra issue is signs, factorisation, equation balance, fractions, patterns, or word-to-equation setup.
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Before you start
What this Mistake Finder checks
Algebra is often where a method that felt clear in class becomes unreliable under exam pressure. A single sign change, an incomplete expansion, or an equation that is not kept balanced can alter every line that follows. This Mistake Finder looks for the kinds of algebra mistakes that make working appear plausible while costing marks.
It focuses on the habits behind O-Level E-Math algebra: reading structure before manipulating it, keeping equivalent expressions genuinely equivalent, and choosing a method that fits the question. The purpose is not to teach a shortcut or reveal a set of answers. It is to help you see whether the issue is a one-off slip or a pattern worth revising deliberately.
Common mistake patterns
- Sign errors when expanding brackets or collecting terms
- Weak factorisation structure, including missed common factors
- Using an inefficient or unstable equation method
- Translating a pattern or context into algebra inaccurately
How it works
Answer 8 short questions and Mentora marks them automatically. Your score appears immediately. A contact step then unlocks your full breakdown: exact mistakes, correct answers and explanations, a mistake-pattern diagnosis, repair guidance, and a topic-specific 7-day repair plan.
Because the questions are short, this is a focused starting point rather than a replacement for your full revision. It is most useful when you want evidence for what to practise next, instead of choosing a topic only because it felt difficult in the last paper.
Who it is for
This is for Singapore Secondary students working towards O-Level E-Math, especially those who practise algebra but still lose marks through recurring method mistakes. It is useful before deciding whether your next revision block should be expressions, factorisation, equations, or problem setup.
What happens after
The result is not simply a score. It helps distinguish mistakes that look isolated from those that repeat within an algebra area or appear across several methods, so your next step is based on a clearer picture.
Use that picture to plan a smaller, more specific revision session. A student does not need to treat every topic as equally weak: targeted practice is easier to review, and it gives you a clearer way to check whether the same method mistake has stopped recurring.