Data interpretation — Quantitative aptitude for kids

The method

Total first — “most questions need the total — then percent, average or difference follow”

1. Total = add every value. Average = total ÷ number of rows.
2. Percent of total = that value ÷ total × 100.
3. Most/fewest: compare all the values. Difference = bigger − smaller.

Use it for: Tables, bar graphs and pie charts in Class 6–10, data interpretation sections in aptitude tests, and reading news charts.

Worked example: Books sold by a shop — Mon: 40, Tue: 60, Wed: 30, Thu: 50, Fri: 20. The number for Thu is what percent of the total? → 25

✏️ Practice

Work it out in your head or on paper, then tap your answer — or type it and press Check. Stuck? Press “Show me how”.

🏁 Lesson 29 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

🏅 Sign in with Google to earn the 📊 Chart Reader badge when you pass — and a certificate when you finish all 10 lessons of Part 3 · Aptitude challenge. You can still take the test without signing in.

🖨️ Data Interpretation Worksheet

• Worksheet set 1 (PDF)
• Worksheet set 2 (PDF)
• Worksheet set 3 (PDF)