Bank Exam Quant – Number Series & Quadratic Equations (Concept + Practice)
Number series and quadratic equations are quick scoring topics. Identifying patterns and solving equations fast is the key.
1. Number Series
A sequence of numbers is given with one missing number. You must find the pattern.
Common Patterns:
- Addition / Subtraction
- Multiplication / Division
- Square / Cube pattern
Example:
2, 4, 8, 16, ?
→ Pattern: ×2
→ Answer: 32
2. Series Tricks
- Check difference first
- Look for multiplication pattern
- Try square or cube relation
3. Quadratic Equations
Solve equations of the form ax² + bx + c = 0
Example:
x² - 5x + 6 = 0
→ (x - 2)(x - 3) = 0
→ x = 2, 3
4. Comparison Type
Compare values of x and y from two equations.
Example:
x² - 4x + 3 = 0 → x = 1, 3
y² - 5y + 6 = 0 → y = 2, 3
→ Compare x and y
Practice Questions
Q1 (Series):
3, 6, 12, 24, ?
Q2 (Series):
1, 4, 9, 16, ?
Q3 (Quadratic):
x² - 7x + 10 = 0
Answers
Q1: 48
Q2: 25
Q3: x = 2, 5
Exam Strategy
- Solve within 30 seconds
- Do not overthink patterns
- Practice different series types daily
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