Free practice · single-choice · medium
Practice
Judge a delivery window
The only facts are that a delivery arrived after 9:00 AM and before noon. Is that sufficient for its exact arrival time?
Information sufficiency test
Stop when the facts determine one exact answer
- Target
- Write the exact requested answer
- Known
- Separate each supplied fact
- Test
- Try two answers that fit every fact
- Decision
- Sufficient, joint, redundant, or insufficient
- Limit
- State the remaining range or missing fact
Relevant evidence may narrow a question without resolving it. Test whether alternatives remain before calculating further.