Data Interpretation – Speed Calculation and Approximation Tricks
Solve DI questions quickly using approximation, simplification and smart calculation techniques.
Key Speed Strategies
- Use approximation wherever possible
- Cancel common factors before calculation
- Focus on options (elimination method)
- Avoid lengthy exact calculations
Approximation Trick
Q: 498 × 19 ≈ ?
Method:
500 × 20 = 10000
Percentage Calculation Trick
Q: 12% of 800
Method:
10% = 80
2% = 16
Total = 96
Division Shortcut
Q: 1000 ÷ 25
Answer: 40
Sample Data Table
| Year | Sales | Profit |
|---|---|---|
| 2021 | 500 | 50 |
| 2022 | 600 | 60 |
| 2023 | 800 | 80 |
| 2024 | 1000 | 120 |
Exam Level Questions
1. Profit % in 2021?
Answer: 10%
2. Increase in sales from 2021 to 2023?
Answer: 300
3. Total profit?
Answer: 310
4. Average sales?
Answer: 725
Common Mistake
Students try exact calculation even when options are far apart.
Speed Tip
In DI, speed matters more than accuracy — approximation is key.
Shaktimatha Learning
Speed Maths • Bank Exam Preparation
Speed Maths • Bank Exam Preparation
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