Series Formula
Series formulas and a topic-wise mock test for logical reasoning placement exams like TCS NQT, Infosys, and Wipro. Revise, then practice.
Key Series Formulas
Series Types
Different types of series you'll encounter:
- Number Series: Arithmetic, Geometric, Mixed patterns
- Letter Series: Alphabetical patterns and sequences
- Mixed Series: Combination of numbers and letters
- Symbol Series: Mathematical symbols and operators
Number Series Patterns
Common patterns in number series:
- Arithmetic Progression: Constant difference (2, 5, 8, 11, 14)
- Geometric Progression: Constant ratio (2, 6, 18, 54, 162)
- Fibonacci Series: Sum of previous two (1, 1, 2, 3, 5, 8)
- Square/Cube Series: Perfect squares/cubes (1, 4, 9, 16, 25)
Letter Series Patterns
Common patterns in letter series:
- Alphabetical Order: A, B, C, D, E...
- Skip Pattern: A, C, E, G, I... (skip 1)
- Reverse Order: Z, Y, X, W, V...
- Mixed Pattern: A1, B2, C3, D4...
Quick Solving Tips
Steps to solve series problems:
- Step 1: Look for obvious patterns first
- Step 2: Check for arithmetic/geometric progressions
- Step 3: Look for alternating patterns
- Step 4: Use elimination method for complex series
Back to Logical Reasoning practice