6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

If there are 17 randomly placed dots on a circle,how many lines can you form using any 2 dots?

A) 126	B) 130
C) 136	D) 120

Answer & Explanation Answer: C) 136

Explanation:

17C2 = 136 (combination)

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Filed Under: Quantitative Aptitude - Arithmetic Ability

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Q:

A shopkeeper has a job to print certain number of documents and there are three machines P, Q and R for this job. P can complete the job in 3 days, Q can complete the job in 4 days and R can complete the job in 6 days. How many days the shopkeeper will it take to complete the job if all the machines are used simultaneously ?

A) 4/3 days	B) 2 days
C) 3/2 days	D) 4 days

Answer & Explanation Answer: A) 4/3 days

Explanation:

Let the total number of documents to be printed be 12.

The number of documents printed by P in 1 day = 4.

The number of documents printed by Q in 1 day = 3.

The number of documents printed by R in 1 day = 2.

Thus, the total number of documents that can be printed by all the machines working simultaneously in a single day = 9.

Therefore, the number of days taken to complete the whole work = 12/9 = 4/3 days.

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Filed Under: Time and Work
Exam Prep: GRE , GATE , CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk , Analyst

4 4309

Q:

A is 1.5 times efficient than B therefore takes 8 days less than B to complete a work. If A and B work on alternate days and A works on first day, then in how many days the work will be completed?

A) 17	B) 19
C) 19.5	D) 21

Answer & Explanation Answer: B) 19

Explanation:

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Filed Under: Time and Work
Exam Prep: Bank Exams

2 4308

Q:

64/12 in simplest form?

A) 19/6	B) 32/4
C) 16/3	D) None of the above

Answer & Explanation Answer: C) 16/3

Explanation:

64/12 = 16/3 in simplest form.

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

5 4303

Q:

Avinash gave a sum of 5400 at the simple rate of interest of 8% to Rajeev for 4 years and Rajeev gave this amount to Chanukya at the rate of 6% for 4 years. Find how much extra amount has to be paid by Rajeev to Avinash after 4 years?

A) Rs. 364	B) Rs. 432
C) Rs. 498	D) Rs. 554

Answer & Explanation Answer: B) Rs. 432

Explanation:

Here Avinash gave to Rajeev and Rajeev gave the same to Chanukya

Principal amount and Time is same but the only difference is Rate of interest.

Rajeev took @ 8% and gave it to Chanukya @ 6%

Here the difference in interest rate = 2%

2% of 5400 should be the extra amount paid by Rajeev to Avinash

Required amount = $\frac{2 x 5400 x 4}{100} = 432$

Hence, Rs. 432 is the extra amount has to be paid by Rajeev to Avinash after 4 years.

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Filed Under: Simple Interest
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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2 4299

Q:

A number is 2 more than thrice the second number and 4 times the smaller number is 5 more than the greater number. What is greater number ?

A) 7	B) 23
C) 9	D) 21

Answer & Explanation Answer: B) 23

Explanation:

Let the greater and smaller number be p and q respectively.

4q = p + 5 ------ (I)

p = 3q+2 ------- (II)

From equation (I) and (II)

q = 7

p = 23

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Filed Under: Problems on Numbers
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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11 4299

Q:

A dealer sells two machines at Rs 12000 each. On one it gains 32% and on the other it looses 32%. What is its profit/loss percentage in the whole transaction?

A) No gain and no loss	B) 1% loss
C) 18% profit	D) 10.24% loss

Answer & Explanation Answer: D) 10.24% loss

Explanation:

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Filed Under: Profit and Loss
Exam Prep: Bank Exams

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Q:

An engineering student has to secure 24% marks to pass. He gets 61 and fails by 29 marks. What is the maximum marks for that exam?

A) 375 marks	B) 400 marks
C) 425 marks	D) 450 marks

Quantitative Aptitude - Arithmetic Ability Questions

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