# Aptitude [3i Infotech Placement]: Sample Questions 20 - 22 of 76

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## Question 20

Aptitude

### Question

MCQ▾

The value of B in the equation is

Choice (4)

a.

b.

c.

d.

d.

### Explanation

The given equation is

This equation matches with the option d.

## Question 21

Aptitude

### Question

MCQ▾

In objective test a correct answer score 4 marks and on a wrong answer 2 marks are negative. A student scores 480 marks from 150 questions. How many answers were correct?

Choice (4)

a.

110

b.

130

c.

150

d.

120

b.

### Explanation

In an objective test, every correct answer will get + 4 marks and every wrong answer will get -2 marks.

A student scores 480 marks from 150 questions.

We are asked to find the correct answers given by student. Let it be x.

So,

So, student has answered 130 correct questions.

## Question 22

Aptitude

### Question

MCQ▾

A postal truck leaves its station and heads for Chicago, averaging 40mph. An error in the mailing schedule is spotted and 24 minutes after the truck leaves, a car is sent to overtake the truck. If the car averages 50mph then how long will it take to catch the postal truck?

Choice (4)

a.

1.5 hours

b.

1.6 hours

c.

2 hours

d.

3 hours

c.

### Explanation

A postal truck leaves the station and heads for Chicago, averaging 40 mph.

An error in the mailing schedule is spotted and 24 minutes after the truck leaves, a car is sent to overtake the truck. The speed of car is 50mph.

Distance covered by both truck and car is same.

Let time taken by truck is x minutes and car is taking minutes.

So, Car will take 2 hours time to catch the postal truck.

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