# Aptitude [HCL Placement]: Sample Questions 39 - 41 of 43

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## Question 39

Aptitude
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### Write in Short

What is the 1′s complement of 1100110?

### Explanation

• The given number is 1100110.
• This number is in binary (base 2) form.
• 1′s complement of number means interchange the positions of 0′s and 1′s. If we will replace all 0 with 1 and all 1 with 0 then the resultant number is the 1′s complement of the given number.
• Here, replacing all 0 with 1 and all 1 with 0, number will be, 0011001.
• Hence, the 1′s complement of the given number is 0011001.

## Question 40

Aptitude

MCQ▾

= X

Choice (4)

a.

b.

c.

d.

c.

### Explanation

= X

= X

Here, we need to find the value of X.

X =

X =

## Question 41

Aptitude
Edit

### Write in Short

A man bought 30 kg apples at cost of 10.5Rs/kg and more 30 kg apples at cost of 9.5 ₹ /kg. He combines both of them, then at what price should he sell to have a gain of 35 % ?

### Explanation

• Man bought 30 kg apples at cost of ₹ 10.5/kg. So, he spends ₹ 315 in purchasing apples.
• He bought more 30 kg apples at ₹ 9.5/kg. So, he spends ₹ 285 in purchasing apples.
• Man purchased total 60 kg of apples in ₹ 600 .
• So, price for 1 kg of apple will be, 600/60 = 10 ₹
• If he wants to gain 35 % in selling then selling price should be,
• So, selling price of apples should be

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