Table

• How to extract and compute from data tables — rows, columns, totals, and missing cells.
• To calculate row/column totals, averages, growth rates, and rankings from tabular data.
• To handle multi-level headers and unit rows in exam-style tables.
• To spot inconsistencies and fill missing entries using row-column sum rules.

Level 1 — Foundations

Verbal: A table organises data in rows (e.g. years, students) and columns (e.g. subjects, regions). Intersection cell = one value.

Reading protocol:

1. Read title and footnotes (units, *, missing = NA).
2. Identify stub (row labels) vs column headers.
3. Check if last row/column is Total.

Operations:

Ratio from table: Compare two cells in same row (same year, two products) or same column (same product, two years).

Level 2 — Exam depth

Percent change from table: ((New − Old)/Old) × 100 using two cells in one column.

Weighted average trap: Average marks of Class A and B need student counts — not average of two class averages unless equal size.

Transpose reading: "Sales by region" table — region in rows vs columns changes nothing if you track labels.

Double totals: Grand total cell should equal sum of row totals and column totals — use as checksum.

Time series tables: Watch fiscal year vs calendar year labels in footnotes.

Fill a missing cell using row and column totals

        Q1   Q2   Q3   Total
Product A  12   ?    15    40
Product B  18   22   20    60
Total      30   35   35   100

Step 1 — A in Q2: row total 40 − 12 − 15 = **13**.
Step 2 — Verify column Q2: 13 + 22 = 35 ✓.

Rank products by annual total

From above, Product B total = 60, Product A = 40 → **B ranked 1st, A 2nd**.
If equal totals, tie rank; next rank skips (standard competition ranking) unless question says otherwise.

• Row totals 50, 70; column totals match — grand total should be?
• Marks: Hindi 80, English 90, Maths ?; average 85 — find Maths.
• Why read footnotes before calculating profit from a revenue table?
• Stretch: Table gives % growth only — reconstruct absolute values possible? When?

Revision tip: Revisit adjacent topics in Data Interpretation before mixed practice on Table.

Open the Practice tab for graded questions on Table.

Shade or bracket total rows/columns so you never add them into fresh sums. For growth-rate items, confirm whether the base year is the earlier column entry. When tables nest headers (region under zone), read the header hierarchy twice before picking a cell. If a cell is missing, solve using the simplest intersecting total — row total usually faster than column.