6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The Average age of 12 men is decreased by one year when two of them having ages 28 years and 32 years are replaced by two women of same age . The age of a women is?

Answer

Suppose age of each women be W and average age of 12 men be x

$\therefore \frac{12x-28-32+2W}{12}=x-1$

$\therefore W=24$

Hence , each woman's age = 24 years

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Subject: Problems on Ages

40 14717

Q:

Among the following which is a rational number?

A) 23	B) 123
C) 83	D) 43

Answer & Explanation Answer: C) 83

Explanation:

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

0 14707

Q:

On 17th March, 1997 Monday falls. What day of the week was it on 17th March, 1996?

A) Monday	B) Tuesday
C) Saturday	D) Wednesday

Answer & Explanation Answer: C) Saturday

Explanation:

The year 1996 is a leap year. So, it has 2 odd days. So, the day on 17th March, 1997 will be 2 days beyond the day on 17th March,1996.

Here 17th March, 1997 is Monday. So, 17th March, 1996 is Saturday.

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Filed Under: Calendar

50 14688

Q:

In a factory there are three types of Machines M1 , M2 and M3 which produces 25%, 35% and 40% of the total products respectively. M1, M2 and M3 produces 2% , 4% and 5% defective products, respectively. What is the percentage of non-defective products?

A) 89%	B) 97.1%
C) 96.1%	D) 86.1%

Answer & Explanation Answer: C) 96.1%

Explanation:

Non- defective products

$\frac{25 x 0.98 + 35 x 0.96 + 40 x 0.95}{100} x 100 = 96.1$

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Filed Under: Percentage
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Analyst , Bank Clerk , Bank PO

22 14684

Q:

What is the ratio whose terms differ by 40 and the measure of which is 2/7 ?

A) 16:56	B) 14:56
C) 15:56	D) 16:72

Answer & Explanation Answer: A) 16:56

Explanation:

Let the ratio be x : (x + 40), then ,

$\frac{x}{x + 40} = \frac{2}{7}$

$\Rightarrow$ 7x = 2x + 80

$\Rightarrow$ x = 16

Required ratio = 16 : 56

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Filed Under: Ratios and Proportions

35 14673

Q:

Kaushalya can do a work in 20 days, while kaikeyi can do the same work in 25 days. They started the work jointly.Few days later Sumitra also joined them and thus all of them completed the whole work in 10 days. All of them were paid total Rs.700. What is the Share of Sumitra?

A) Rs.130	B) Rs.185
C) Rs.70	D) can't be determined

Answer & Explanation Answer: C) Rs.70

Explanation:

Efficiency of kaushalya = 5%

Efficiency of kaikeyi = 4%

Thus, in 10 days working together they will complete only 90% of the work.

[(5+4)*10] =90

Hence, the remaining work will surely done by sumitra, which is 10%.

Thus, sumitra will get 10% of Rs. 700, which is Rs.70

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Filed Under: Time and Work

12 14672

Q:

The ratio of students in a coaching preparing for B.tech and MBA is 4 : 5. The ratio of fees collected from each of B.tech and MBA students is 25 : 16. If the total amount collected from all the students is 1.62 lakh, what is the total amount collected from omly MBA aspirants?