Free practice · numeric · medium
Practice
Recover a missing value
The mean of three numbers is 12. Two numbers are 10 and 14. What is the third number?
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.