4 Views

Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
63, 64, 60, 69, 53, ?

Option 1: 77

Option 2: 76

Option 3: 88

Option 4: 78


Team Careers360 24th Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: 78


Solution : Given:
63, 64, 60, 69, 53, ?

In the above-given series, add and subtract alternately the square of the consecutive natural numbers.
63 + 1 2 = 63 + 1 = 64
64 – 2 2 = 64 – 4 = 60
60 + 3 2 = 60 + 9 = 69
69 – 4 2 = 69 – 16 = 53
53 + 5 2 = 53 + 25 = 78

So, 78 is the missing number of the series. Hence, the fourth option is correct.

Know More About

Related Questions

TOEFL ® Registrations 2024
Apply
Accepted by more than 11,000 universities in over 150 countries worldwide
Manipal Online M.Com Admissions
Apply
Apply for Online M.Com from Manipal University
GRE ® Registrations 2024
Apply
Apply for GRE® Test now & save 10% with ApplyShop Gift Card | World's most used Admission Test for Graduate & Professional Schools
View All Application Forms

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students
30,000+ Colleges
500+ Exams
1500+ E-books