📊 Study Notes – “Tables”
(Quantitative Aptitude – Tripura Patwari / Lekhpal Program)
1️⃣ What is a Table?
- A table is a grid of rows and columns.
- It organizes numbers or information so you can see patterns quickly.
- Think of it like a grocery price list: each row is a product, each column is a price.
2️⃣ Why Do We Use Tables?
- Save time: You don’t have to calculate every single number.
- Avoid errors: The numbers are already checked.
- Find answers fast: Just look up the right row and column.
3️⃣ How to Read a Table
| Step | What to do | Quick Tip |
|---|---|---|
| 1 | Identify the row heading (the thing you vary). | Look at the leftmost column. |
| 2 | Identify the column heading (the thing you keep the same). | Look at the top row. |
| 3 | Find the cell where the row and column meet. | That cell is your answer. |
| 4 | If the table gives a percentage or ratio, convert it to a decimal or fraction if needed. | 20 % → 0.20 (or 1/5). |
4️⃣ Common Table Types in Aptitude
| Type | Everyday Analogy | Tiny Example |
|---|---|---|
| Frequency Table | How many times you see a word in a book. | |
| Row: Word | ||
| Column: Frequency | ||
| “Patwari” – 3 times, “Lekhpal” – 2 times | ||
| Time–Value Table | A watch that shows how many hours a machine runs. | |
| Row: Hours | ||
| Column: Production | ||
| 1 h → 50 units, 2 h → 100 units | ||
| Conversion Table | A recipe that converts cups to teaspoons. | |
| Row: Cups | ||
| Column: Teaspoons | ||
| 1 cup → 48 tsp, 2 cups → 96 tsp | ||
| Percentage Table | A sale list showing discount percentages. | |
| Row: Item | ||
| Column: Discount % | ||
| “Sofa” – 15 %, “Table” – 10 % |
5️⃣ Tiny Example – Using a Table
Problem
You have a table that tells you how many coins you get for each 10 rupee bill at a shop.
| 10 rupees | Coins |
|---|---|
| 1 | 12 |
| 2 | 24 |
| 3 | 36 |
Question: If you give 5 rupees (half a 10‑rupee bill), how many coins do you get?
Solution
- Find the row for 10 rupees → 12 coins.
- 5 rupees is half of 10, so you get half of 12 → 6 coins.
6️⃣ Tips for Solving Table Problems
- Read the headings first.
- Check units: Sometimes the table uses “days,” “units,” or “percent.”
- Look for patterns: Many tables grow linearly (add the same amount each step).
- Use simple math: If you can’t find the exact row, interpolate or extrapolate using the pattern.
- Double‑check: Cross‑verify with the problem statement.
7️⃣ Practice Question
| Day | Total Sales (₹) |
|---|---|
| 1 | 200 |
| 2 | 400 |
| 3 | 600 |
| 4 | 800 |
| 5 | 1000 |
Question
How many sales are recorded on day 7?
Answer Key
- The sales increase by ₹200 each day.
- Day 6 → 1200, Day 7 → 1400.
- Answer: 1400 ₹
Quick Recap
- Tables are simple grids that let you look up answers instantly.
- Identify row and column headings, then read the intersecting cell.
- Practice with small tables to build confidence.
Happy studying! 🚀