Series for elitmus

Series for elitmus

Series for elitmus, series is an important topic of logical reasoning in elitmus you can expect around 1 to 2 question from series in elitmus.

Type of question in elitmus you can expect from series.

Series questions in reasoning are basically of two types, Series completion (missing term, next term) and Series correction (finding the wrong element in the series).

Number Series

Number series is a sequence of numbers which is framed, using a particular system/rule, in which the numbers are not in a specific order. All we have to do is to find out the system/rule that a particular series is following and finding the number using that system/rule.

Popular types of number series one can expect in elitmus

1. Prime number series: (consist set of prime number)

2. Perfect square series: (consist set of the perfect square)

3. Perfect cube series: (consist set of the perfect cube)

Sample question and solution of series specific to elitmus.

Question 1 : Find the missing term : 157.5, 45, 15, _, 3, 2, 2

Solution : Le the missing number be ‘n’

157.5 / 45 = 3.5

45 / 15 = 3

15 / n = 2.5

n / 3 = 2

3 / 2 = 1.5

2 / 2 = 1

Therefore, the missing number is 6.

Question 2 : Find the next term in the series : 6, 7, 9, 13, _

Solution : Let the missing number be ‘n’

7 – 6 = 1

9 – 7 = 2

13 – 9 = 4

n – 13 = 8

Therefore, next number in the series = n = 21

Question 3 : Find the incorrect element in the series : 1, 3, 10, 36, 152, 760, 4632

Solution :

1 x 1 + 2 = 3

3 x 2 + 4 = 10

10 x 3 + 6 = 36

36 x 4 + 8 = 152

152 x 5 + 10 = 770

770 x 6 + 12 = 4632

Therefore, the incorrect element in the series is 760.

Series for elitmus