Aptitude [3i Infotech Placement]: Sample Questions 71 - 73 of 76

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Question 71

Aptitude
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Short Answer▾

A monkey starts climbing up a tree 20ft tall. Each hour, it hops 3ft and slips back 2ft. How much time would it take the monkey to reach the top?

Explanation

Tree is 20 ft tall.

In every hour Monkey is climbing up 3 ft and slips back 2 ft.

So, we can say that in one hour monkey is climbing only 1 ft.

We are asked to find the time that monkey will take to reach the top.

In 17 hours monkey will have climbed 17 ft.

In next hour as he will climb 3 ft he will be on the top.

So, we can say that monkey will take 18 hours to reach the top of the tree.

Question 72

Aptitude
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Short Answer▾

A school has 30 % students from Maharashtra. Out of these 20 % are Bombay students. Find the total percentage of Bombay?

Explanation

School has 30 % students from Maharashtra.

Out of these 20 % students are from Bombay.

We are asked to find the percentage of students who are from Bombay.

Let there be 100 numbers of students.

From these 100 students, 30 are from Maharashtra.

Now, 20 % of 30 students are from Bombay. So, there are students from Bombay.

So, there are 6 % students from Bombay.

Question 73

Aptitude

Question

MCQ▾

A father is 30 years older than his son however he will be only thrice as old as the son after 5 years what is father՚s present age?

Choices

Choice (4)

a.

50 yrs

b.

40 yrs

c.

30 yrs

d.

None of the above

Answer

b.

Explanation

let՚s say present age of father and son is f and s years respectively.

Presently, father is 30 years older than son.

So,

Father will be thrice the age of his son after 5 years.

So,

Substituting the value of f from equation (i) into equation (ii) ,

We are asked to find the present age of father.

So, years.

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