6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

3/5 as a decimal fraction?

A) 0.25	B) 0.45
C) 0.60	D) 0.75

Answer & Explanation Answer: C) 0.60

Explanation:

Given fraction is 3/5

Now, multiply with 2 for numerator and denominator

we get,

3/5 x 2/2 = 6/10

When we divide, 6 with 10, we get 0.6 as quotient.

Hence, 3/5 as a decimal fraction is 0.6.

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Filed Under: Decimal Fractions
Exam Prep: AIEEE , Bank Exams , CAT , GATE
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3 2300

Q:

A, B and C can together do a job in 9 days. C alone can do the job in 36 days. In how many days can A and B do 50% of the job working together?

A) 6	B) 12
C) 9	D) 15

Answer & Explanation Answer: A) 6

Explanation:

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Filed Under: Time and Work
Exam Prep: Bank Exams

0 2299

Q:

A trader sold a cycle at a loss of 10%. If the selling price had been increased by Rs. 200, there would have been a gain of 6%. The cost price of the cycle is

A) Rs.1200	B) Rs.1205
C) Rs.1250	D) Rs.1275

Answer & Explanation Answer: C) Rs.1250

Explanation:

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Filed Under: Percentage
Exam Prep: Bank Exams

1 2299

Q:

On dividing $24 a^{2} b^{2} by 6 b^{2}$ , we will get

A) 4b	B) 4ab
C) 4	D) 4a2

Answer & Explanation Answer: D) 4a2

Explanation:

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Filed Under: Simplification
Exam Prep: Bank Exams

0 2298

Q:

The standard deviation of the set {10, 10, 10, 10, 10} is

A) 0	B) 1
C) 5	D) 10

Answer & Explanation Answer: A) 0

Explanation:

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Filed Under: Average
Exam Prep: Bank Exams

24 2297

Q:

The length of the diagonal of a rectangle is 26 cm and that of one side is 10 cm. What is the area of this rectangle?

A) 260 sq cm	B) 120 sq cm
C) 130 sq cm	D) 240 sq cm

Answer & Explanation Answer: D) 240 sq cm

Explanation:

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Filed Under: Area
Exam Prep: Bank Exams

1 2295

Q:

If $\frac{a}{b + c} = \frac{b}{c + a} = \frac{C}{b + a}$ then which one of the following statements is correct?

A) Each fraction is equal to 1 or -1	B) Each fraction is equal to 1/2 or 1
C) Each fraction is equal to 1/2 or -1	D) Each fraction is equal to 1.2 only

Answer & Explanation Answer: C) Each fraction is equal to 1/2 or -1

Explanation:

a/(b+c) = b/(c+a) = c/(a+b)

Taking reciprocal and adding 1 to each ratio we get;

(b+c)/a + 1 = b/(c+a) + 1 = c/(a+b) + 1

Or (a+b+c)/a = (a+b+c)/b = (a+b+c)/c

So this can only be equal when a=b=c or a+b+c = 0

When a=b=c we get

a/(b+c)= ½When a+b+c = 0 we get

b+c = -a

So a/(b+c) = -1

So the ratios are ½ or -1

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

The average marks of 40 students in an examination was 34. It was later found that the marks of one student had been wrongly entered as 62 instead of 26. what is the correct average?

A) 33.1	B) 33.3
C) 33.5	D) 33.7

Quantitative Aptitude - Arithmetic Ability Questions

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