number series Detailed Explanation And More Example

MOST IMPORTANT verbal reasoning - 4 EXERCISES

Top 10,000+ Verbal Memory Based Exercises

Directions:
In each of the following number series, two terms have been put within brackets. Mark your answer as
    (a) If both the bracketed terms are right;
    (b) If the first bracketed term is right and second is wrong;
    (c) If the first bracketed term is wrong and second is right; and
    (d) If both the bracketed terms are wrong.

[M.A.T. 2005]

The following question based on series completion topic of verbal reasoning

Questions : 2, 3, (6), 11, 18, (30), 38

(a) If both the bracketed terms are right

(b) If the first bracketed term is right and second is wrong

(c) If the first bracketed term is wrong and second is right

(d) If both the bracketed terms are wrong

The correct answers to the above question in:

Answer: (b)

The correct pattern is +1, +3, +5, +7, +9, +11.

Clearly, the term 6 is correct.

But, 30 is wrong and must be replaced by (18 + 9)

i.e. 27.

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Read more number series test Based Verbal Reasoning Questions and Answers

Question : 1

(2), 5, (12), 25, 41, 61

a) If both the bracketed terms are right

b) If the first bracketed term is right and second is wrong

c) If the first bracketed term is wrong and second is right

d) If both the bracketed terms are wrong

Answer: (d)

The correct pattern is +4, +18, +12, +16, +20.

Clearly, 2 is wrong and must be replaced by (5 - 1)

i.e. 4. Also, 12 is wrong and must be replaced by (5 + 8)

i.e. 13.

Question : 2

4, 7, (9), 10, 13, 15, (16), 19

a) If both the bracketed terms are right

b) If the first bracketed term is right and second is wrong

c) If the first bracketed term is wrong and second is right

d) If both the bracketed terms are wrong

Answer: (a)

The correct pattern is +3, +2, +1, +3, +2, +1, +3.

Clearly, both the terms 9 and 16 are correct.

Question : 3

3, 10, 29, (66), (127), 218

a) If both the bracketed terms are right

b) If the first bracketed term is right and second is wrong

c) If the first bracketed term is wrong and second is right

d) If both the bracketed terms are wrong

Answer: (a)

The sequence is 13 + 2, 23 + 2, 33 + 2, 43 + 2, 53 + 2, 63 + 2.

Clearly, both the terms 66 and 127 are correct.

Question : 4

4, 6, 10, (12), 16, (14), 22

a) If both the bracketed terms are right

b) if the first bracketed term is right and second is wrong

c) If the first bracketed term is wrong and second is right

d) If both the bracketed terms are wrong

Answer: (b)

The correct pattern is +2, +4, +2, +4, …..

Clearly, the term 12 is correct.

But, 14 is wrong and must be replaced by (16 + 2)

i.e. 18.

Directions:
In each of the following questions, one term in the number series is wrong. Find out the wrong term.

Question : 5

4, 10, 22, 46, 96, 190, 382

a) 4

b) 10

c) 96

d) 382

Answer: (c)

The correct pattern is +6, +12, +24, +48, +96, +192.

So, 96 is wrong and must be replaced by (46 + 48) i.e. 94.

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