List of top Logical Reasoning Questions on Sequence and Series asked in NIT MCA Common Entrance Test

Which number replaces the question mark? \[ 3, 6, 18, 72, ?, 432 \]
Consider a sequence formed by concatenating the positive integers in increasing order: 12345678910111213... Which among the following is the closest to the 2028th 4th digit in this infinite sequence?

What is the next number in each of the following 3 sequences? 
8, 17, 33, 67, 133, 1? 
 

Which number replaces the question mark?
4, 9, 16, 25, ?, 49

Complete the next series: 
\[ \begin{array}{ccc} 2 & 8 & 12 \\ \hline 8 & 40 & 45 \\ \hline 40 & 240 & 246 \\ \hline --- & --- & --- \\ \hline \end{array} \]

What comes next in the sequence?
2, 6, 12, 20, 30, ______
The mean of consecutive positive integers from 2 to \( n \) is:

Directions: A, B, C, D, and E are five different integers. When written in the ascending order of values, the difference between any two adjacent integers is 8. D is the greatest and A the least. B is greater than E but less than C. The sum of the integers is equal to E. The value of A is:

In a certain language, HEART is written as 2018010508, and LUNGS is written as 1907142112. If BRAIN is written in that language, what will be the last number?

Directions: A, B, C, D, and E are five different integers. When written in the ascending order of values, the difference between any two adjacent integers is 8. D is the greatest and A the least. B is greater than E but less than C. The sum of the integers is equal to E. The sum of A and B is:

Find a number from the given options which best completes the series: 39, 416, 525, \(\dots\), 749, 864 
 

Thirty-six vehicles are parked in a parking lot in a single row. After the first car, there is one scooter. After the second car, there are two scooters. After the third car, there are three scooters and so on. Work out the number of scooters in the second half row.
Identify the next two numbers in the following sequence: 17, 20, 9, 12, 5, 6, 3, 2, ?, ?
Complete the series: 3, 10, 24, 45, 73, ......
Find out the wrong number in the FOLLOWING series. 2, 5, 10, 17, 26, 38, 50, 65
Identify the sixth number in the series: 6, 11, 21, 36, 56, ?
Identify the fifth number in the series: 122, 144, 166, 188, ?