8th Class Mental Ability Alpha-Numeric, Number, Ranking and Time Sequence, Logical, Alphabet Alpha-Numeric Sequence Puzzle, Number, Ranking and Time Sequence Test, Logical Sequence of Words and Alphabet Test

ALPHA-NUMERIC SEQUENCE PUZZLE

In such type of questions, a sequence of numbers, letters and symbols is given and a student i5 asked how many times a number/letter/symbol follows a certain rule or which number/letter symbol follows a certain rule.

EXAMPLE

1.  How many symbols are there in the given arrangement each of which is not immediately preceded by a digit but immediately followed by a letter?

       4 2 @ + A P 5 > - 6 < T M 4 L Z = 1 - 8 3 D * #

      (a) None                        (b) One           

      (d) Two                         (d) Three

Explanation (b):

The group having given properties is @ + A.

So, the correct option is (B).

NUMBER, RANKING AND TIME SEQUENCE TEST

Number Test:

In these type of problems, a sequence of numbers is given and a student is asked questions same as in the way as asked in Alpha-Numeric Sequence Puzzle.

Ranking Test:

In ranking test based problems, usually the ranks of one or two persons from the top and from the bottom are mentioned. A student is required to compute either total number of persons or rank of a person.

2.  In a class of 60, the girls are twice that of boys, Karim ranked seventeenth from the top. If there are 9 girls ahead of Karim, how many boys are there after him?

      (a) 3                              (b) 10             

     (d) 12                            (d) 15

Explanation (c):

Let number of boys = x, then x + 2x = 60

x = 20

There are 16-9=7 boys ahead of Karim. '

Number of boys after Karim =20-1 -7=12

Time Sequence Test:

To solve the time based problems the following information are very useful.

•          The needles of a clock are called its hands.
•          Whenever we are performing problems on two hands of a clock, they are hour and minute hands.
•          In every 1 hour, the hour hand rotates 30° and the minute hand rotates 360°.
•          The month of February has minimum number of days. These are 28 or 29.
•          1 year = 365 or 366 days.
•          The year which is divisible by 4 is called a leap year. e.g., year 2012 is a leap year.
•          A century which is divisible by 400 is called a leap year. e.g. 2000 is a leap year but 2100 is not.
•          There are 29 days in February of a leap year.
•          There are 366 days in a leap year and 365 days in a non-leap year or ordinary year.
•          1 century = 100 years.

3.   If 1st October is Sunday, then 1st November will be _________.

      (a) Monday                                (b) Tuesday       

      (d) Wednesday                     (d) Thursday

Explanation (c):

1st, 8th, 15th, 22nd, and 29th October are Sundays.

So, 31st October is Tuesday.

1st November will be Wednesday.

LOGICAL SEQUENCE OF WORDS

In such type of problems, some words are given. These words have some relationship amongst one another or have a specific sequence.

A student is required to identify this relationship or sequence and put them in a logical sequence.

This sequence may be according to size, age, need, etc.

4.   Arrange the words given below in a meaningful sequence.

      1. Leaf            

      2. Fruit           

      3. Stem           

     4. Root  

     5. Flower

    (a) 3, 4, 5, 1, 2               (b) 4, 3, 1, 5, 2      

    (d) 4, 1, 3, 5, 2               (d) 4, 3, 1, 2, 5

Explanation (b):

The order of growing a tree is:

Root, Stem, Leaf, Flower, Fruit.

So the correct option is (B).

ALPHABET TEST

English Alphabet:

The English alphabet contains 26 letters in all.

These starts from A and ends with Z as written below:

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

•          The first letter is A. The 10th letter is J.
•          The 10th letter from the right is Q.

A rule to find positions of letters is "EJOTY".

Dictionary:

A dictionary consists of those letters or words first which commence with A, then B and, so on.

For example, the sequence of letters P, A, M, L and Z in the dictionary is A, L, M, P, Z

For another example, the sequence of words Mango, Apple, Orange, Tomato and Liquid in a dictionary is: Apple, Liquid, Mango, Orange, Tomato.                                  

5.  Which of the following words will come in second place, if all of them are arranged alphabetically as in a dictionary?

     (a) Crude                                   (b) Crumb         

     (d) Cruise                            (d) Crupper           

Explanation (c):

We will consider the fourth letter because first three letters are the same.

The fourth letters are : d, m, i and p. Their order as in dictionary is d, i, m, p.

Therefore, the word in 2nd place is 'Cruise'.                                                                    

So the correct option is (c).