Number Sequence & Logic Test Practice: Differences, Ratios, Interleaved Series, Letter Codes and Grid Puzzles
Practise the number series questions found in job aptitude tests: constant differences, second differences and ratios, interleaved and alternating series, special sequences, letter-number codes, grid puzzles and a timed mixed set, with every cell checked as you go.
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About this course
In this course you practise the number series questions that appear in job aptitude tests, with original exam-style questions. You find constant differences and the nth term of arithmetic series, build a second-difference table for growing gaps, and use ratios for geometric series and mixed rules like × 2 + 1 without rounding traps. MOD separates interleaved series by odd and even position, SQRT, POWER and a prime list continue special sequences, and a lookup table turns letters into alphabet positions with a MOD 26 wrap past Z. Grid puzzles get a missing cell and a rule check, and a timed mixed set scores itself and shows where the time went.
Lessons
- Arithmetic Series: Constant Differences, the nth Term and Missing Terms Pro
- Second Differences: When the Gaps Themselves Grow Pro
- Geometric Series: Constant Ratios, Mixed × and + Rules and Rounding Traps Pro
- Interleaved & Alternating Series: Odd and Even Positions, Two Rules at Once Pro
- Special Sequences: Squares, Cubes, Primes and Fibonacci-Type Sums Pro
- Letter–Number Codes: Alphabet Positions, Letter Steps and Wrapping Past Z with MOD Pro
- Grid & Matrix Puzzles: Row Rules, Column Rules, the Missing Cell and the Rule Check Pro
- Timed Mixed Set: 10 Questions, Self-Scoring, Time per Question and Error Analysis Pro