Mental Ability Tests on 'Alphabet and Number Sequences and Series' Set 115 | 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

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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

John is ranked 19th from the top and Rajni is ranked 9th from the bottom in a class of 27 students. How many students are there between John and Rajni?

Soln.
Ans: C

Sum of positions of an item from top(right) and bottom(left) of a list is always equal to the sum of the positions of the first and last items. So position of John from the bottom is = 27 - 19 + 1 = 9. Number of students between them is: difference of 9 and 17 (minus 1) = 7

Question ID: 16-02-10-11-59-51-571.
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Question 2

If every letter beginning from O is replaced by consecutive odd number beginning with 3, which number or letter will be 6th to the right of the 13th number or letter counting from the right end?

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: B

The series becomes:

A B C D E F G H I J K L M N 3 5 7 9 11 13 15 17 19 21 23 25

Question ID: 16-02-10-11-59-51-572.
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Question 3

This is a series of digits that has been written by randomly arranging 19 digits. How many 5 are there that are completely divisible by the second number to their right?

6 5 3 8 4 2 6 1 4 7 5 3 2 5 5 9 5 5 9

Soln.
Ans: A

At these locations: 5-9-5 ;

Question ID: 16-02-10-11-59-51-573.
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Question 4

If every letter beginning from position 6, 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 W will be there in the resulting sequence?

O A C Q C O E P F I V R J G G D Y J T W A X D V H

Soln.
Ans: A

The series becomes:

O A C Q C P F Q G J W S K H H E Z K U X B Y E W I

Question ID: 16-02-10-11-59-51-574.
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Question 5

Carefully scan the following series of digits from 1-9, and determine how many 7 are there that are completely divisible by the number on their left but not divisible by the number that is second to their left?

7 7 3 6 7 8 5 1 3 7 4 1 8 2 5 2 7 6 9

Soln.
Ans: A

None.

Question ID: 16-02-10-11-59-51-575.
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