Ask whether the data is enough
Compare sufficiency and interpret tables.
The idea
Data sufficiency asks whether a unique answer can be determined, not whether every variable can be calculated. In a table, compare like measures such as margins rather than revenue alone.
A method to try
- Test each statement alone before combining them.
- Look for counterexamples to a proposed sufficient statement.
Follow the reasoning.
Is the integer m even? Statement 1: m is divisible by 4. Statement 2: m is divisible by 3. Assess the statements separately.
- Statement 1 is sufficient: every multiple of 4 is even. The precise value of m is unnecessary for this yes/no question.
- Statement 2 is insufficient: 3 is odd while 6 is even, and both satisfy the statement. These counterexamples produce different answers to the target question.
- Do not carry information from statement 1 into the evaluation of statement 2. Combining statements is a later step only when required by the question.
Think it through first.
Can a statement be sufficient for a yes/no question when it always establishes No?
Show the explanation
Yes.
Sufficiency requires a definite answer, not specifically a Yes answer.
Make it your own
After reading, explain the method in your own words and identify the condition that makes it valid. Then try the linked starter practice without referring back to the worked example. Review the reasoning behind an error before repeating the same item; remembering an answer is different from being able to solve a new problem.
This lesson is one part of a short starter pathway. It does not cover the full exam syllabus or establish a predicted score.
Official references
These provider and publisher links explain the exam or underlying concepts. Our lessons and questions are original, independent practice.
View 4 references and checked dates
- GMAC: exam structure (opens in a new tab)Checked 2026-10-06
- GMAC: exam content (opens in a new tab)Checked 2026-10-06
- GMAC: official preparation (opens in a new tab)Checked 2026-09-20
- GMAC: calculator and note-taking policies (opens in a new tab)Checked 2026-10-06