Number & Alphabet Series
Find the next or missing term in number, letter, letter-cluster and alpha-numeric series, and complete blank-filling letter series: 6 bilingual sets from easy to hard.
Topics Covered in Number & Alphabet Series
Number & Alphabet Series Practice Tests
Number & Alphabet Series Practice Set 01
Number & Alphabet Series Practice Set 02
Number & Alphabet Series Practice Set 03
Number & Alphabet Series Practice Set 04
Number & Alphabet Series Practice Set 05
Number & Alphabet Series Practice Set 06
Smart Practice Path
Start with Easy, move to Medium, and challenge yourself with Hard test results.
Why Practice Number & Alphabet Series?
- Series questions appear in the General Intelligence & Reasoning section of CBT 1
- Trains you to test the common rules in a fixed order
- Letter series sharpen the alphabet positions used in coding
- Each set is 15 questions in 12 minutes with 1/3 negative marking
Concepts You Will Master
- Constant difference, constant ratio and differences that grow
- × a + b rules, alternating operations and two series mixed together
- Sum of the previous two terms, cubes and squares with a fixed change
- Letter positions with fixed or growing gaps
- Repeating blocks in blank-filling letter series
Preparation Tip
Write the differences between terms first. If they are not constant, check whether they grow by a fixed step, double, or alternate. If nothing fits, test × a + b, then two mixed series (odd and even places).
Explore Other Reasoning Topics
About Number & Alphabet Series
Series questions ask you to find the rule behind a list of numbers or letters and continue it. These six sets cover number, letter, letter-cluster, alpha-numeric and blank-filling series. Each answer is the only option that fits any common series rule, and every question has an explanation in English, Hindi and Hinglish.
FAQs
There are 6 sets: 2 easy, 2 medium and 2 hard. Each set has 15 questions and a 12-minute timer.
Each correct answer gives 1 mark and each wrong answer deducts 1/3 mark, the same as RRB NTPC CBT 1.
Yes. Every question can be attempted in English or Hindi, and solutions are given in English, Hindi and Hinglish.
The differences between consecutive terms. Most series are explained by the differences, the ratios, or two series written alternately.
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