Testbook Logo
Exams SuperCoaching Test Series Skill Academy
More
English
Hindi
Telugu
Bengali
Marathi
Tamil

Question

Download Solution PDF

Refer to the following number series and answer the question.

7 2 9 6 3 7 3 9 7 7 3 9 7 3 2 2 1 3 3 9 3 7 3 9 3 9

How many 3s are there that are immediately preceded by 7 and immediately followed by 9?

This question was previously asked in
RRB Group D 20 Sept 2022 Shift 1 Official Paper
Download PDF Attempt Online
View all RRB Group D Papers >
  1. Two
  2. Four
  3. Five
  4. Three

Answer (Detailed Solution Below)

Option 4 : Three
Free Tests
View all Free tests >
Free
RRB Group D Full Test 1
3.1 Lakh Users
100 Questions 100 Marks 90 Mins
Start Now

Detailed Solution

Download Solution PDF

We have to find the triad which looks like (7,3,9) in the given series:
 

F1 Railway Amit A 19-02-2023 D21

We can see that there are 3 such triads where 3 is immediately preceded by 7 and immediately followed by 9.

Hence, the correct answer is " Three ".

Download Solution PDF
Latest RRB Group D Updates

Last updated on Jun 30, 2025

-> The RRB NTPC Admit Card 2025 has been released on 1st June 2025 on the official website.

-> The RRB Group D Exam Date will be soon announce on the official website. Candidates can check it through here about the exam schedule, admit card, shift timings, exam patten and many more.

-> A total of 1,08,22,423 applications have been received for the RRB Group D Exam 2025. 

-> The RRB Group D Recruitment 2025 Notification was released for 32438 vacancies of various level 1 posts like Assistant Pointsman, Track Maintainer (Grade-IV), Assistant, S&T, etc.

-> The minimum educational qualification for RRB Group D Recruitment (Level-1 posts) has been updated to have at least a 10th pass, ITI, or an equivalent qualification, or a National Apprenticeship Certificate (NAC) granted by the NCVT.

-> This is an excellent opportunity for 10th-pass candidates with ITI qualifications as they are eligible for these posts.

-> The selection of the candidates is based on the CBT, Physical Test, and Document Verification.

-> Prepare for the exam with RRB Group D Previous Year Papers.

‹‹ Previous Ques
Next Ques ››

More Number Arrangement Questions

Q1.How many even numbers are there in the sequence which are immediately followed by an odd number? 4 6 7 8 3 3 4 5 7 6 8 9 2 7 9 1 3 5 2
Q2.How many such 9s are there in the following number sequence which are immediately preceded by 5? 7 9 6 9 5 9 8 4 7 9 5 7 4 5 9 2 3 7 9 1 2 7 5 9 7 7
Q3.Refer to the following series and answer the question (all numbers are single digit numbers only). (Left) 6 2 1 3 7 6 9 7 4 3 5 2 3 4 3 4 2 3 1 5 7 9 5 8 5 7 5 (Right) How many such even digits are there each of which is immediately preceded by an even digit and also immediately followed by an odd digit?
Q4.This question is based on the five, three-digit numbers given below. (Left) 721 145 342 372 547 (Right) (Example- 697 – First digit = 6, second digit = 9 and third digit = 7) (NOTE: All operations to be done from left to right.) If all the numbers are arranged in descending order, the position(s) of how many numbers will remain unchanged?
Q5.This question is based on the five, three-digit numbers given below. (Left) 842 234 371 723 463 (Right) (Example- 697 – First digit = 6, second digit = 9 and third digit = 7) (NOTE: All operations to be done from left to right.) What will be the resultant if the third digit of the highest number is added to the second digit of the lowest number?
Q6.Answer the question asked keeping in mind the following series. Numbering should be from left to right only. (All numbers are single digit numbers) (Left) 2 5 3 1 1 8 1 7 9 9 4 8 2 7 5 0 5 7 5 3 7 0 5 8 3 4 2 4 8 1 (Right) How many odd numbers are there, each of which is immediately preceded by an odd number and followed by an even number?
Q7.Answer the question given keeping in mind the sequence given below. The numbering should be from left to right only. (All numbers are single-digit numbers)  (Left) 2 2 8 5 0 7 9 7 9 7 2 4 2 9 4 3 0 0 3 7 8 7 8 5 5 1 8 1 0 (Right) How many such even digits are there, each of which is immediately preceded by an odd digit and immediately followed by an odd digit?
Q8.This question is based on the five, three-digit numbers given below. (Left) 164 253 927 834 519 (Right) (Example- 697 - First digit = 6, second digit = 9 and third digit = 7) NOTE: All operations to be done from left to right. If 2 is added to second digit of every number, in how many numbers will the second digit be exactly divisible by the first digit?
Q9.This question is based on the five, three-digit numbers given below. (Left) 354 756 423 635 679 (Right) (Example- 697 – First digit = 6, second digit = 9 and third digit = 7) (NOTE: All operations to be done from left to right.) If 2 is added to the first digit of every number, in how many numbers will the first digit be exactly divisible by the second digit? 
Q10.Refer to the following series and answer the question (all numbers are single digit numbers only). (Left) 4 2 1 5 7 9 8 7 3 4 3 5 6 2 1 5 1 5 2 8 5 6 9 7 4 7 3 (Right) How many such odd digits are there each of which is immediately preceded by an odd digit and also immediately followed by an even digit?

More Arrangement and Pattern Questions

Q1.If it is possible to make only one four-letter meaningful word with the first, third, fourth, and eighth letter of the word ‘ABNORMALITY’, which could be the second letter of the word from the left end? If more than one such word can be formed, give ‘X’ as the answer. If no such word can be formed, give ‘Z’ as your answer.
Q2.If in the word BEAUTICIAN, all the consonants are replaced by the previous letter in the alphabet and all the vowels are replaced by the next letter, then all the letters are arranged in the alphabetical order. Then which letter will be fourth from the right end?
Q3.How many even numbers are there in the sequence which are immediately followed by an odd number? 4 6 7 8 3 3 4 5 7 6 8 9 2 7 9 1 3 5 2
Q4.If the first half of the word AUTOMOBILE is reversed, which of the following will be the fourth to the right of the third letter from the left end? 
Q5.How many such 9s are there in the following number sequence which are immediately preceded by 5? 7 9 6 9 5 9 8 4 7 9 5 7 4 5 9 2 3 7 9 1 2 7 5 9 7 7
Q6.Which of the following letters in the English alphabet series is as far from H as U is from N?
Q7.If in the word AFFECTIONATE, all the consonants are replaced by the next letter in the alphabet and all the vowels are replaced by the previous letter, then all the letters are arranged alphabetically, which  will be the fifth letter from the left?
Q8.Suppose the first and the second letters of the word INCOMPREHENSIBLE changed places, also the third and the fourth, the fifth and the sixth, and so on. In the new word, thus formed, which letter would be 10th from the left?
Q9.Refer to the following number, symbol series and answer the question. Counting to be done from left to right only.   (Left) # % 5 4 3 2 1 @ % * # * 6 § 9 8 % $ 1 5 6 4 2 (Right) How many such numbers are there each of which is immediately preceded by a symbol and also immediately followed by another symbol?

More Logical Reasoning Questions

Q1.If it is possible to make only one four-letter meaningful word with the first, third, fourth, and eighth letter of the word ‘ABNORMALITY’, which could be the second letter of the word from the left end? If more than one such word can be formed, give ‘X’ as the answer. If no such word can be formed, give ‘Z’ as your answer.
Q2.How many boys are there between Q and T?
Q3.How many boys are lighter than U?
Q4.Find the next number in the series. 6, 12, 18, 36, 54, 108, ?
Q5.Find the next number in the series. 24, 36, 60, 84, 132, 156, ?
Q6.Find the odd image out in the given series.
Q7.How many squares are there in the given figure?
Q8.A man starts from point A and walks 5km towards East. He turns right and walks 4km; turns right again and walks 3km. He then takes another right and walks 6km. He walks 6km towards East; turns right and walks 2km and turns left and walks 1km to reach B. How far is A from B?
Q9.Replace the question mark with an option that follows the same logic applied in the first pair. 29 : 18 :: 39 : ?
Q10.A girl is facing North direction. If she turns 59 degrees in clockwise direction and 31 degrees in the same direction, which direction will she face now?
Exams
Cut Off
Eligibility
Coaching
Previous Year Papers
Syllabus
Test Series
Important Exams
Super Coaching
Testbook USA SAT Exam
Testbook USA ACT Exam
US College Admissions Guide
Testbook Edu Solutions Pvt. Ltd.
1st & 2nd Floor, Zion Building,
Plot No. 273, Sector 10, Kharghar,
Navi Mumbai - 410210
[email protected]
Toll Free:1800 833 0800
Office Hours: 10 AM to 7 PM (all 7 days)
Company
About usCareers We are hiringTeach Online on TestbookPartnersMediaSitemap
Products
Test SeriesTestbook PassOnline CoursesOnline VideosPracticeBlogRefer & EarnBooks
Our Apps
Follow us on
Copyright © 2014-2022 Testbook Edu Solutions Pvt. Ltd.: All rights reserved
User PolicyTermsPrivacy
Get Free Access Now
Hot Links： teen patti lotus teen patti real cash apk lotus teen patti rummy teen patti teen patti royal