Quantitative Aptitude – Approximation (Fast Calculation Tricks for Bank Exams)
Approximation helps you solve questions quickly by rounding numbers. It is very useful in exams where speed is important.
Basic Idea
Instead of exact calculation, we round numbers to nearby values.
Example:
498 ≈ 500
302 ≈ 300
Approximation Rule
- If last digit ≥ 5 → round up
- If last digit < 5 → round down
Easy Example
Question:
498 + 302
Solution:
500 + 300 = 800 ✔
Multiplication Example
Question:
49 × 21
Solution:
50 × 20 = 1000 ✔
Division Example
Question:
198 ÷ 5
Solution:
200 ÷ 5 = 40 ✔
Comparison Method
Use approximation to compare options quickly.
Example:
498 × 21 vs 502 × 19
→ Approximate both and compare
Quick Tricks
- Round numbers smartly
- Do not over-round
- Use nearest simple number
Practice Questions
Q1: 499 + 301 ≈ ?
Q2: 52 × 19 ≈ ?
Q3: 198 ÷ 4 ≈ ?
Answers
Q1: 800
Q2: 1000
Q3: 50
Final Tip
Approximation is all about speed. Practice daily to solve questions in seconds.
No comments:
Post a Comment