Top 50 Number Series Questions for IBPS & SBI Clerk Prelims: Download PDF

Number series questions are commonly included in the Quantitative Aptitude section of banking exams such as IBPS Clerk and SBI Clerk Prelims. These questions require candidates to identify the pattern or relationship between the numbers in a given series and use it to determine the missing or incorrect number.

Different series can be based on addition, subtraction, multiplication, division, squares, cubes, or a combination of more than one operation. Regular practice can help you recognise these patterns more quickly and solve questions within the limited time available in the exam.

The Top 50 Number Series Questions for IBPS and SBI Clerk Prelims given below provide practice across different types of number series. You can attempt the questions first and then refer to the answers to evaluate your performance.

Top 50 Number Series Questions for IBPS & SBI Clerk Prelims

The following 50 number series questions are provided for practice for the IBPS and SBI Clerk Prelims. The set covers different patterns that you may encounter while preparing for the Quantitative Aptitude section.

Direction (1–26): What should come in place of the question mark '?' in the following number series?

Q.1 - 7, 10, 18, 42, 90, ?

(A) 220
(B) 366
(C) 210
(D) 240
(E) 200

Solution: Answer – (C) 210
Explanation: The differences are 3, 8, 24, 48, 120, which follow the pattern 2²−1, 3²−1, 5²−1, 7²−1, 11²−1 (squares of prime numbers minus 1). So 90 + 120 = 210.

Q.2 - 357, 320, 294, 277, ?, 262

(A) 267
(B) 270
(C) 265
(D) 272
(E) None of these

Solution: Answer – (A) 267
Explanation: The differences between terms are 37, 26, 17, 10, 5, and the differences of these differences are 11, 9, 7, 5. So 277 − 10 = 267.

Q.3 - 4, 15, 58, 229, ?, 3643

(A) 425
(B) 434
(C) 912
(D) 524
(E) None of these

Solution: Answer – (C) 912
Explanation: The pattern is ×4 −1, ×4 −2, ×4 −3, ×4 −4. So 229 × 4 − 4 = 912. (Check: 912 × 4 − 5 = 3643 ✓)

Q.4 - 48, 24, 72, 18, 90, ?

(A) 25
(B) 22
(C) 15
(D) 40
(E) 50

Solution: Answer – (C) 15
Explanation: The pattern is ÷2, ×3, ÷4, ×5, ÷6. So 90 ÷ 6 = 15.

Q.5 - 17, 16, 30, 87, 344, ?

(A) 1735
(B) 1760
(C) 1660
(D) 1685
(E) 1715

Solution: Answer – (E) 1715
Explanation: The pattern is ×1−1, ×2−2, ×3−3, ×4−4, ×5−5. So 344 × 5 − 5 = 1715.

Q.6 - 6, 3, 3, 6, 24, ?

(A) 64
(B) 96
(C) 124
(D) 156
(E) 192

Solution: Answer – (E) 192
Explanation: The pattern is ×0.5, ×1, ×2, ×4, ×8. So 24 × 8 = 192.

Q.7 - 125, 80, 45, ?, 5

(A) 50
(B) 20
(C) 25
(D) 17
(E) 19

Solution: Answer – (B) 20
Explanation: The differences are −45, −35, −25, −15. So 45 − 25 = 20.

Q.8 - 256, 374, 504, 646, 800, ?

(A) 876
(B) 995
(C) 966
(D) 846
(E) None of these

Solution: Answer – (C) 966
Explanation: The differences are +118, +130, +142, +154, +166 (each increasing by 12). So 800 + 166 = 966.

Top 50 Number Series Questions PDF by PW

You can use the Top 50 Number Series Questions PDF by PW for focused practice and revision. The PDF can be downloaded and used separately for solving the questions without referring to the answers immediately.

The PDF can include all 50 questions along with their answers and solutions, making it useful for practising number series questions during IBPS and SBI Clerk Prelims preparation.

How Top 50 Number Series Questions PDF Helps in Preparation

The Top 50 Number Series Questions PDF can help candidates practise different number patterns in one place. Solving these questions regularly can improve familiarity with common series types and help candidates become more comfortable with calculations during IBPS and SBI Clerk Prelims preparation.

• Practise different patterns: Solve series based on addition, subtraction, multiplication, division and mixed operations.

• Improve calculation speed: Regular practice can help you perform calculations more quickly.

• Understand series logic: Reviewing the solutions can help you identify the pattern used in each question.

• Improve accuracy: Attempting questions independently and checking the answers can help identify calculation errors.

• Revise before the exam: The PDF can be used for quick practice and revision of number series questions.

Number series questions require candidates to identify patterns quickly and perform calculations accurately. Practising a variety of series can help improve speed and familiarity with different question formats. If you are preparing for IBPS and SBI Clerk Prelims, you should include number series practice along with other Quantitative Aptitude topics as part of your regular preparation.