When given a data table in a question, what is the first step to determine the correct answer quickly?

• A. Read every cell of the table in detail before deciding.
• B. Guess based on the most frequent value in the table.
• C. Ignore units and constraints to speed up.
• D. Determine what is being asked, locate relevant data, and note any units or constraints; perform a quick calculation or comparison.

Answer: (D)

The main idea is to approach a data table by first clarifying the task and then pulling only the data you need. Knowing what you’re trying to determine tells you which data to focus on in the table. Next, check units and any constraints because they affect what numbers you can compare and what calculations are valid. With that focus, do a quick calculation or a straightforward comparison to identify the answer. This method saves time and reduces mistakes by avoiding the temptation to sift through every cell. Reading every cell in detail is unnecessary and slow, while guessing from the most frequent value ignores the actual question and data context. Ignoring units or constraints can lead to invalid conclusions, so always note them before comparing.