Erudex journal
Logical reasoning: Worked Practice and Mistake Review
Number sequences, deduction and pattern rules that test structured problem solving.
Use the examples below to examine the reasoning process before practising under a timer. Erudex offers three fixed papers per section, each with ten questions and a twelve-minute limit. Sign in to begin a paper; explanations appear after submission.
Key points
- •Explain the method before inspecting the key.
- •Review guessed answers and missed questions.
- •Interpret repeated-paper improvements cautiously.
Worked example 1
All engineers are employees. All employees are trained. Which statement must be true?
Answer: All engineers are trained.. If A ⊂ B and B ⊂ C, then A ⊂ C.
Before checking the answer, write your reasoning. After checking it, explain why a different choice would fail; this distinguishes a reliable method from a lucky selection.
- •No engineers are trained.
- •Some employees are not trained.
- •All trained are engineers.
- •All engineers are trained.
Worked example 2
What number comes next? 13, 22, 31, 40, 49, ?
Answer: 58. Add 9 each time.
Before checking the answer, write your reasoning. After checking it, explain why a different choice would fail; this distinguishes a reliable method from a lucky selection.
- •57
- •67
- •60
- •58
Worked example 3
What number comes next? 3, 5, 9, 15, 23, ?
Answer: 33. The gap grows by 2 each time (2, 4, 6, 8, 10).
Before checking the answer, write your reasoning. After checking it, explain why a different choice would fail; this distinguishes a reliable method from a lucky selection.
- •35
- •31
- •33
Move from worked examples to timed practice
Complete a paper without looking at explanations, then review incorrect, guessed and unanswered questions separately. Record accuracy and completion time. An improvement on a repeated fixed paper may reflect memory, so keep that limitation in your review.
For candidate screening, use scores with job-relevant work samples and structured interviews. These practice papers have not been established as validated predictors of job performance or clinical ability.
Frequently asked questions
- Can I use these practice scores as an employment decision?
- Do not use a practice score as the sole hiring decision. Consider the role, accessibility needs and other relevant evidence.