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This mock test of Test: Number Series - 5 for LR helps you for every LR entrance exam.
This contains 10 Multiple Choice Questions for LR Test: Number Series - 5 (mcq) to study with solutions a complete question bank.
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QUESTION: 1

Look at this series: 2, 6, 18, 54, ... What number should come next?

Solution:

QUESTION: 2

Look at this series: 5.2, 4.8, 4.4, 4, ... What number should come next?

Solution:

In this simple subtraction series, each number decreases by 0.4.

QUESTION: 3

Look at this series: 4, 9, 19, 39, 79,... What number should come next?

Solution:

The pattern is

4*2+1=9

9*2+1=19

19*2+1=39

39*2+1=79

79*2+1=159

QUESTION: 4

Look at this series: 2, 4, 6, 8, 10, ... What number should come next?

Solution:

QUESTION: 5

Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?

Solution:

QUESTION: 6

Look at this series: 14, 28, 20, 40, 32, 64, ... What number should come next?

Solution:

The series is 14, 28, 20, 40, 32, 64

Take three terms at a time. The notation be as follows:-

Let, First term = a = 14

It is evident that Second term= 2*a = 2 * 14 = 28 and,

The Third term = Second term - 8 OR ( 2*a - 8 ) = 28 - 8 = 20

Now consider the third, fourth and the fifth term.

Let, Third term = a = 20

It is evident that Fourth term= 2*a = 2 * 20 = 40 and,

The Fifth term = Second term - 8 OR ( 2*a - 8 ) = 40 - 8 = 32

Similarly consider fifth, sixth and the seventh(term to be found).

Let, Fifth term = a = 32

It is evident that Sixth term = 2*a = 2 * 32 = 64 and,

The Seventh term ( term to calculated) = Second term - 8 OR ( 2*a - 8 ) = 64 - 8 = 56

QUESTION: 7

Look at this series: 201, 202, 204, 207, ... What number should come next?

Solution:

In this addition series, 1 is added to the first number; 2 is added to the second number; 3 is added to the third number; 4 is added to the fourth number; and go on.

QUESTION: 8

Look at this series: 80, 10, 70, 15, 60, ... What number should come next?

Solution:

This is an alternating addition and subtraction series. In the first pattern, 10 is subtracted from each number to arrive at the next. In the second, 5 is added to each number to arrive at the next.

QUESTION: 9

Look at this series: 544, 509, 474, 439, ... What number should come next?

Solution:

This is a simple subtraction series.

Each number is 35 less than the previous number.

(544 - 35 = 509) (509 - 35 = 474) (474 - 35 = 439) (439 - 35 = 404)...

QUESTION: 10

Look at this series: 8, 6, 9, 23, 87 , ... What number should come next?

Solution:

8 x 1 - 2 = 6

6 x 2 - 3 = 9

9 x 3 - 4 = 23

23 x 4 - 5 = 87

87 x 5 - 6 = 429

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