HCL Papers: Sample Questions 4  6 of 57
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Question number: 4
» Aptitude
Write in Short
What will be the next term in the following series?
2,4, 6,12,14,28 —, —
Explanation
 In the given series second term is twice of first term and third term is two more than second term.
 Like, and .
 Same way, and
 Same way, .
 So, next term should be two more than 28, i. e.
 Term after 30 should be twice of 30, i. e.
 So, next two terms in the series should be 30 and 60.
Question number: 5
» Aptitude
Question
In signed magnitude notation what is the minimum value that can be represented with 8 bits
Choices
Choice (4)  Response  

a.  255 

b.  127 

c.  0 

d.  128 

Answer
d.Explanation
In signed magnitude we are using MSB (Most Significant Bit) to indicate the sign of number. If MSB is 1 then it indicates that number is negative and if it is 0 then the number is positive. Next seven bits are of power base 2. Calculating the number considering the bit position and its weight, it will be 128. Considering the sign of MSB, it will be 128. So, minimum value that can be stored with 8 bits is 128 whereas the maximum positive value is + 127.
Question number: 6
» Aptitude
Question
The cost price of 36 books is equal to the selling price of 30 books. What will be the gain?
Choices
Choice (4)  Response  

a.  20% 

b.  82% 

c.  18% 

d.  16% 

Answer
a.Explanation
 Cost price of 36 books is equal to selling price of 30 books.
 So, cost price (CP) of books will be Rs. 30.
 Selling price (SP) of books will be Rs. 36.
 Gain, =
=
= 6 Rs.
 Gain (%) =
=
= 20%
 Gain will be 20%.