The next number in the series 12, 15, 21, 33, 57, ..... - Practice (English) | ObjectiveMcq

Loading practice questions

A focused practice platform for competitive-exam MCQs, subject wise, topic wise practice, and current affairs revision.

Exams

SSC CGL
UPSC CSE PRELIMS
IBPS PO
RRB NTPC
CDS

Subjects

Mathematics
Physics
General Knowledge
English
Reasoning

Resources

Current Affairs
Search MCQs
Practice Sets

Company

About Us
Contact
Privacy Policy
Terms of Use
Disclaimer
Copyright

Practice library for exams, subjects, and daily revision. For learning purposes only.

© 2026 ObjectiveMcq.ComAll rights reserved

The next number in the series 12, 15, 21, 33, 57, ..... - Practice (English) | ObjectiveMcq

PracticeMathematical Reasoning And AptitudeBasicsThe next number in the series 12, 1...

Basics Mathematical Reasoning And AptitudeMedium

1,490 views

The next number in the series 12, 15, 21, 33, 57, ......, is:

Correct Answer: B — 105

Explanation:

No explanation is available for this question yet.

Related Practice

In the sequence of numbers

2/3, 4/7, X, 11/21, 16/31

The missing number X is:
A bag contains an equal number of one rupee, 50 paise and 25 paise coins. If the total amount in the bag is Rs. 35, how many coins of each type are there ?
The sum of a positive number and its reciprocal is twice the difference of the number and its reciprocal. The number is :
January 1, 1995 was Sunday. What day of the week lies on January 1, 1996?
The average of four consecutive even numbers is 27. The largest of these numbers is:
Monday falls on 20th March 1995. What was the day on 3rd November 1994?
Insert the missing number:

16/32, 15 /33, 17/31, 14/34, ?
The sides of a triangle are in the ratio of 1/2:1/3:1/4. If its perimeter is 52 cm, the length of the smallest side is :