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Day-2 | Aptitude Questions and Answers with Explanation

  • Question-1
  • Explanation

1.Consider a courier company A which can deliver 100 parcels in 5 days with 5 men working for 8 hours a day. Consider another courier company B where every employee is equally efficient as that of company B.Company B is short of one man when compared to A and has a policy of asking its workers to work only for 6 hours a day.How long (in days) company B will take to deliver 100 parcels

a) 8.3   b) 24   c) 12   d) 6.6 

Answer: a) 8.3 days

Total amount of work W = N* D*W

Where N = Number of men, D = Number of days, W = amount of work per day.

Applying the above formula for company A we get, work done by company A to deliver

100 parcels = 5*5 *8 = 200 –eq 1 Work done by company B to deliver 100 parcels = 5*D *6 = 24D –Seq2

Since the work to be done is same in both the cases, eq1 = eq2 or 200 = 24D or D= 8.3

  • Question-2
  • Explanation

2. Consider a group of working men. If 1/10th of the workers are absent then work of each person would be increased by.

a) 20%   b) 22.22%   c)10%   d) 11.11% 

Answer: d) 11.11%

Let us assume 100 units of work is divided among 10 men.

When no one is absent, each member have to do 100/10 = 10 units of the work

With 1/10th of men absent, there would be 9 men present.

Now, if 100 units of work is to be done by the 9 men present, each should do 100 / 9 units of work.

Extra work required from each member when only 9 men are present = 100 /9 – 10 = 10 /9 units.

Percentage of increase of work for each member = ( Extra Work required from each member when only 9 men are present) / ( Original amount of work when everyone is present) * 100 % = ()10/9)*/10)* 100% = 11.11%

  • Question-3
  • Explanation

3) In an examination, it is required to score 32% of the aggregate marks for  a student to pass the examination. Raju has scored 250 marks and was declared failed by 22 marks. Find the aggregate marks?

a)  720    b) 750  c) 800  d) 850

Answer: d) 850

Let the aggregate marks be X. Minimum pass mark is = 250 + 22 = 272

32% of X is 272. i.e. (32/100)* X = 272

X = 272 * 100 /32 = 850. Hence the aggregate mark is 850.

  • Question-4
  • Explanation

An Individual deposited 20% of 25% of 30% of what he had into his account with a bank. If he deposited Rs.750, how much was he having initially with him before depositing?

a) Rs.500000   b) Rs.50,000 c) Rs.5000   d) Rs.15000

Answer: b) Rs. 50,000

Let the initial amount he had be A

30% of A = 30/100*A

25% of 30% of A = 25/100 *30/100 * A

20% of 25% of 30% of A = 20/100 * 25/100 *30/100 * A

But it is given that 20% of 25% of 30% of A = 750

Or 20/100 * 25/100 * 30/100 * A = 750

Therefore A = 750 * 100/20* 100/25 * 100/30 = 50000

  • Question-5
  • Explanation

The Population of a Village is 45000. 5/9th of them are males and rest females. If 40% of the males are married, then the percentage of married females is:

a) 50    b) 40   c) 70   d) 60

Answer: a) 50

Total Population – 45000.

Out of this 5/9 are males – 25000

Out of males 40% are married – 10000

Number of female – 20000. Number of Female married, which should be equal to that of married males – 10000

Percentage of married female – (10000/20000) * 100 = 50%.

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