Mental Ability Tests on 'Alphabet and Number Sequences and Series' Set 134 | free questions for competitive exams for banks, PO exams, NDA, CAT, CDS, ITBP, Civil, Defence Services and National Talent Search Exams, UGC NET, GATE, CSAT

Posted by Parveen(Hoven),
Aptitude Trainer and Software Developer

Quiz Questions

Each question has four choices. More than one option can be correct. After you have finished the quiz scroll towards the last question to view your result. I have provided solutions and answers to all the questions.

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Question 1

In the sequence of alphabets and digits below, how many pairs are such that the first item is an alphabet but the second is a number?

C 2 Z 1 8 2 4 9 6 L S 4 X 7 3 N O T G J

Soln.
Ans: D

At these locations: C-2 ;Z-1 ;S-4 ;X-7 ;

Question ID: 16-02-10-11-59-51-666.
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Question 2

If every letter beginning from position 8, counted from left, is replaced by its successor in the English alphabet, and any Z after this position is replaced by A, then, how many O will be there in the resulting sequence?

I V E Y W R R W C Q L S O J Q M H P H V P O L N J

Soln.
Ans: A

The series becomes:

I V E Y W R R X D R M T P K R N I Q I W Q P M O K

Question ID: 16-02-10-11-59-51-667.
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Question 3

This is a series of digits and alphabets. How many pairs are such that the consecutive items are both numbers?

S B J 7 8 9 5 E 6 Z O P R D T X C 5 A 1

Soln.
Ans: D

At these locations: 7-8 ;8-9 ;9-5 ;

Question ID: 16-02-10-11-59-51-668.
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Question 4

If the first half of the following series is reversed, then which item is 6th to the left of the 9th item from the right side? The series is:

1 L 5 8 I F U M S Z P X B 7 6 C Y H N 2

Soln.
Ans: C

Midpoint is 10. We have to find 20 - 9 - 6 = 5 + 1th item from the left side. Since the location lies in the left half, the sequence has been reversed in this zone. So the item will be at location 10 - 5 = 5 + 1 from the left in the original series. Which means the item is: F.

Question ID: 16-02-10-11-59-51-669.
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Question 5

If the alphabets at the positions 1, 4, 5, 6, 12, 20 and 21 are picked up and a meaningful word is formed out of them, what would be the second letter of that word?

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Soln.
Ans: A

The letters are: A, D, E, F, L, T, U. The word is DEFAULT

Question ID: 16-02-10-11-59-51-670.
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