How is your preparation going for the Delhi Police Constable reasoning section? Let’s make it stronger by preparing one of the most important and scoring topics: “Series”. You already know that the General Intelligence & Reasoning section is your biggest weapon for scoring maximum marks quickly. You can expect at least 3 to 4 questions from this topic based on Number, Alphabet, or Mixed Series in the Delhi Police Constable exam. SSC includes these questions to check your ability to spot patterns, think logically, and calculate accurately under time pressure. Mastering this topic is important because it lays the foundation for other topics, such as Analogies and Classification. In this blog, we have provided a lot of exam-level Series questions for the Delhi Police Constable exam in a PDF. Download the PDF for free and start solving these high-scoring questions.
Concept of Series in Reasoning
Series questions test your ability to find a logical, consistent rule or sequence that connects the given elements. Once you identify the pattern, you must find the missing element that follows the same rule.
The elements can be:
- Number Series: (e.g., 2, 5, 10, 17, ?) → Pattern is +3, +5, +7, … (Prime numbers or odd numbers added).
- Alphabet Series: (e.g., A, C, F, J, ?) → Pattern is +2, +3, +4, … (Difference in alphabetical position).
- Mixed/Alpha-Numeric Series: (e.g., B2D, D4H, F8P, ?) → Combinations of letters and numbers following separate rules.
Key Patterns You Must Memorize for Series
Success in Series relies on instant recognition of underlying mathematical or alphabetical rules. Memorize this checklist to solve any question quickly:
| Series Type | Common Patterns to Look For |
|---|---|
| Number Series | 1. Differences/Sums: Look at the gap between adjacent numbers. (e.g., +2, +4, +8, …) 2. Squares and Cubes: Numbers slightly more or less than perfect squares or cubes. (e.g., N² + 1) 3. Multiplication/Division: The next term is a multiple of the previous one. (e.g., ×2 – 1) 4. Alternate Series: Every second or third number forms its own sequence. |
| Alphabet Series | 1. Positional Value: Convert letters to numbers (A=1, Z=26). The pattern will be numerical. 2. Vowel/Consonant: The sequence is based on the position of vowels or consonants. 3. Gap/Jump: The number of letters skipped is the core rule (e.g., skip 1, skip 2, skip 3). |
Series Questions for Delhi Police Constable PDF, Download for Free
The questions asked in the Delhi Police Constable exam are straightforward. If you have done some practice, then you can easily solve these questions. They are rarely overly tricky, focusing on the basic application of the rules listed above. To help you practice exactly these types of questions, we have provided a PDF. You will get the most important and frequently asked questions from this topic in the exam. Click on the button given below to download the Series Questions for Delhi Police Constable PDF for free.
Click to Download Delhi Police Constable Series Questions PDF for Free
Question 1: Select the combination of letters that when placed sequentially in the blanks of the given series will complete the series.
B _ _ K E _ _ N J _ E F D _ J _ _ F
A) N, J, F, K, M, N, E, D
B) N, J, F, C, K, N, K, E
C) N, J, F, N, N, D, K, E
D) N, J, N, C, K, M, K, E
Question 2: Find the missing group of alphabets in the following series.
H, HJ, JLN, NPRT, _____
A) VXZBD
B) TVXZB
C) TXZBD
D) UWYAC
Question 3: Select the wrong number from the given series?
400, 200, 600, 150, 750, 135
A) 600
B) 200
C) 400
D) 135
Question 4: Select the option that represents the letters that, when placed from left to right in the following blanks, will complete the letter series.
Q __ B __ __ M __ U B __ __ J Q U __ G T __
A) U, G, Q, Q, G, T, B, G
B) U, T, T, Q, G, T, B, M
C) U, G, T, Q, G, T, B, G
D) U, T, T, Q, Q, T, B, G
Question 5: Select the letter cluster from among the given options that can replace the question mark (?) in the following series.
PSG, UXL, QTH, TWK, ?, SVJ
A) VWK
B) RVK
C) RUL
D) RUI
Question 6: Select the combination of the letters that when placed sequentially in the blanks of the given letter series will complete the series.
A A T O _ _ A A _ O O P _ A T _ O P A _ _ O O _
A) O, T, P, A, O, T, P, A
B) O, P, T, A, O, T, P, A
C) O, P, T, A, O, A, T, P
D) P, O, T, A, T, O, A, P
Question 7: Select the number that can replace the question mark (?) in the following series.
512, 478, 446, 416, 388, 362, 338, ?
A) 215
B) 323
C) 332
D) 316
Question 8: Select the number from among the given options that can replace the question mark (?) in the following series.
5, ?, 30, 150, 1050, 11550
A) 25
B) 10
C) 20
D) 15
Question 9: Select the option that represents the letters that, when placed from left to right in the following blanks, will complete the letter series.
Y r _ V _ _ _ S V_ Y r _ V t _ r S V _
A) s, T, Y, r, t, S, Y, t
B) S, t, Y, r, t, S, Y, t
C) S, r, Y, T, t, S, Y, r
D) S, T, y, r, s, S, Y, t
Question 10: Select the number from among the given options that can replace the question mark (?) in the following series.
78, 99, 124, 158, 208, ?
A) 197
B) 283
C) 225
D) 263
Click to Download Delhi Police Constable Series Questions PDF for Free
Preparation Tips for Delhi Police Constable Series Questions
The Series section is easy to crack, but mostly candidates fail to score this section because they don’t know the right approach to solve these questions. You need a structured approach to maximize your speed. Follow these tips every time you practice:
- Memorize Positional Values: You must know the numerical position of every letter instantly (e.g., K=11, S=19). This instantly converts the tricky Alphabet Series into a simple Number Series.
- Look for Two Patterns: If the difference between terms doesn’t show a clear rule, check for an Alternate Series. Every second number might follow one pattern, and the remaining numbers follow another.
- Start with Differences (Number Series): Your first step should always be to calculate the difference between adjacent terms. If the first difference is unclear, calculate the difference between those differences (the second level of difference).
- Practice All Types Together: Don’t practice only Number Series for a week. Mix Number, Alphabet, and Mixed Series in your daily practice to train your mind to switch patterns quickly, just like in the real exam.
- Time Yourself: Since Series questions are high-volume, they are great for time management practice. Aim to solve these 3-4 questions in under 2 minutes during your mock tests.
Also Read:
- Delhi Police Constable Cut Off
- Delhi Police Constable Syllabus
- Delhi Police Constable Notification 2025
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FAQs: Series Questions for Delhi Police Constable
Series questions are highly scoring and appear frequently in the exam, testing your pattern recognition, logical thinking, and calculation speed.
Usually, 3–4 Series questions appear in the reasoning section, covering Number, Alphabet, and Mixed Series patterns.
There are three types: Number Series, Alphabet Series, and Mixed or Alpha-Numeric Series.
Start by checking the difference between terms; look for addition, subtraction, multiplication, division, squares, or alternating sequences.
Convert letters to numbers using their positional values (A=1 to Z=26) to identify patterns or differences easily.
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