GMAT Two-Part Analysis: find the constraint, then test the pairs

Two-Part Analysis gives you one scenario, one shared list of options, and two answer columns. You pick one option for each column, and GMAC gives you credit only when both picks are right. If you test every option in both columns, you burn the clock before you find the pair. This guide gives you a faster method: find the column that constrains the other, cut its list, and test only the pairs that survive.

What the format asks

Two-Part Analysis lives in the Data Insights section, which gives you 20 questions in 45 minutes and an on-screen calculator. The prompt describes a situation, and a table below it lists the options in rows, with one answer column for each part. GMAC writes these questions as quantitative, verbal, or a mix of both. The two parts often depend on each other: two values that satisfy a pair of conditions, a rate and the time that matches it, or a strengthener and a weakener for the same argument.

The scoring rule shapes the method. GMAC gives no partial credit, so a right first column with a wrong second column scores the same as two wrong picks.

Test pairs, not options

The two columns share one list, so a list of six options gives you up to 36 possible pairs. When the columns depend on each other, an option that looks right in one column means nothing until you find a partner for it in the other. Testing every pair wastes the clock, and testing each column on its own misses the link. The method cuts the list first, so you test two or three pairs instead of 36.

The method in five steps

Step 1: Name the link

Before you touch the options, write the condition that ties the two columns together. In a quantitative question, the link is usually an equation or an inequality with one unknown per column. In a verbal question, the link is a relationship, such as a cause and its effect, or a claim and the evidence that would weaken it. If no condition ties the columns together, you face two short questions that share a list; answer each one on its own and go straight to step 5.

Step 2: Find the column that constrains the other

Look for a requirement that applies to one column alone. A count must be a whole number. An equation can force one unknown to be even or keep it under a ceiling. A verbal label can demand one specific kind of statement. The column with the tighter requirement constrains the other. When both columns carry requirements, start with the column whose requirement rules out more options.

Step 3: Cut that column’s list

Apply the single-column requirement to every option and cross out the options that fail. You want to finish with one, two, or three survivors. If most of the list survives, you picked the weaker column, so switch to the other one.

Step 4: Test only the surviving pairs

For each survivor, use the link to work out what the other column must hold, then look for that value in the list. If the list contains it, you have a candidate pair. If it does not, cross out the survivor. Each test takes one short calculation, and the on-screen calculator handles any messy division.

Step 5: Check both labels and every condition

Before you select, reread the column headings and confirm that each pick sits under the right one. Then run your pair through every condition in the prompt, not only the one you used to find it. If you swap the two values, you score zero even though both numbers are right.

Example: posters and banners

Example: A print shop sells posters for $12 each and banners for $30 each. On Saturday, its poster and banner sales came to exactly $516. The question asks for a number of posters and a number of banners that together fit that total. The first column takes the posters, the second takes the banners, and both columns share this list of options: 6, 8, 13, 18, 23, 25.

Step 1 names the link. With p posters and b banners, 12p + 30b = 516. Divide both sides by 6 to get 2p + 5b = 86.

Step 2 finds the constraining column. Rewrite the link as 5b = 86 - 2p. Both 86 and 2p are even, so 5b must be even, and b must be even too. And 5b cannot exceed 86, so b can be at most 17. The banner column now carries two requirements of its own.

Step 3 cuts the banner column. Of the six options, only 6, 8, and 18 are even, and 18 breaks the ceiling of 17. Two survivors remain: 6 and 8.

Step 4 tests the two surviving pairs. If b = 6, then 2p = 86 - 30 = 56, so p = 28, and 28 does not appear in the list. If b = 8, then 2p = 86 - 40 = 46, so p = 23, and 23 does appear in the list.

Step 5 checks the pair against the original prompt. Twenty-three posters at $12 bring in $276, and 8 banners at $30 bring in $240, for a total of $516. Select 23 in the posters column and 8 in the banners column.

You could start from the poster column instead, but it constrains less. For b to be a whole number, 86 - 2p must be a multiple of 5, so p must end in 3 or 8. Four options survive that cut (8, 13, 18, and 23), which leaves four pairs to test instead of two. Choosing the tighter column halved the work.

The same method on verbal questions

Verbal Two-Part Analysis questions swap equations for logical links. A question might ask for one option that strengthens an argument and one that weakens it, or for a plan and the finding that would justify it. Find the column with the narrower label and cut its list first. A statement can weaken an argument only if it bears on the link between the evidence and the conclusion, and that test usually rules out several options at once. Then check each survivor against the other column’s label, and confirm that your two picks fit together when the prompt requires them to.

Pacing

Data Insights averages 2 minutes 15 seconds per question. Allow 2.5 to 3 minutes for a Two-Part Analysis question, and make up the difference on faster questions elsewhere in the section. Spend the first 30 seconds on steps 1 and 2, because that decision sets the rest of your work. If you reach 3 minutes with more than two pairs still alive, pick the pair that satisfies the most conditions, bookmark the question, and move on. Question Review & Edit lets you change up to three answers per section if time remains.

Mistakes to avoid

• Solving each column alone when the prompt links them. The option that fits column one by itself can leave column two without a partner.
• Testing every option in both columns. Cut the list first.
• Swapping the columns. Reread both headings before you select.
• Checking only one condition. Run your final pair through every condition in the prompt.
• Reaching for the calculator before the setup. Parity and size limits can settle the question with almost no arithmetic.

GMAX holds Two-Part Analysis questions with an explanation after every answer and an on-screen calculator, as on the exam. The free plan gives you five practice questions and one rated match a day, so you can run this method daily until it becomes automatic.