6500+ Quantitative Aptitude Questions and Answers With Explanation

Q:

The compound interest on Rs. 30,000 at 7% per annum is Rs. 4347. The period (in years) is:

A) 2	B) 3
C) 4	D) 5

Answer & Explanation Answer: A) 2

Explanation:

Amount = Rs. (30000 + 4347) = Rs. 34347

(1+7/100)^n=34347

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0 3150

Q:

5 boys and 3 girls can together cultivate a 23 acre field in 4 days and 3 boys and 2 girls together can cultivate a 7 acre field in 2 days. How many girls will be needed together with 7 boys, if they cultivate 45 acres of field in 6 days?

A) 4	B) 3
C) 2	D) 1

Answer & Explanation Answer: C) 2

Explanation:

Let workdone 1 boy in 1 day be b

and that of 1 girl be g

From the given data,

4(5b + 3g) = 23

20b + 12g = 23 .......(a)

2(3b + 2g) = 7

6b + 4g = 7 ........(b)

Solving (a) & (b), we get

b = 1, g = 1/4

Let number og girls required be 'p'

6(7 x 1 + p x 1/4) = 45

=> p = 2.

Hence, number of girls required = 2

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9 3149

Q:

For a nominal interest rate of 8.4%, what is the compounding frequency if the periodic interest rate is:2.1

A) 1	B) 2
C) 3	D) 4

Answer & Explanation Answer: D) 4

Explanation:

i=j/m

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0 3146

Q:

Express 3/8 and 1/10 as a Decimals?

A) 1.375 & 1	B) 0.375 & 1
C) 13.75 & 1.1	D) 0.375 & 0.1

Answer & Explanation Answer: D) 0.375 & 0.1

Explanation:

3/8 as a Decimal :

In this we should convert the denominator into 10, 100, 1000, 10000, 100000,... to make it simple.

Now to make 8 into 1000, we multiply numerator and denominator with 125

=> $\frac{3 x 125}{8 x 125} = \frac{375}{1000} = 0.375$

1/10 as a Decimal :

1 divided into 10 parts of each 0.1.

Therefore, 3/8 = 0.375 and 1/10 = 0.1 in decimals.

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Filed Under: Decimal Fractions
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3 3143

Q:

A loan is made for $3500 with an interest rate of 9% and payments made annually for 4 years. What is the payment amount?

A) 8906	B) 1089
C) 1070	D) 1080.34

Answer & Explanation Answer: D) 1080.34

Explanation:

A=R[(1+i)^n-1]/i(1+i)^n

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1 3131

Q:

What amount must you invest now at 4% compounded monthly to accumulate $10,000 after 3 year

A) 8695	B) 7695
C) 3695	D) 4695

Answer & Explanation Answer: A) 8695

Explanation:

Given: j = 4%, m= 12, FV = $10,000, Term= 3.5 years
Then n =m *Term 12(3.5) 42

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0 3130

Q:

Calculate the effective interest rate of a 10% annual rate compounded continuously.

A) 9.52%	B) 10.52%
C) 11.52%	D) 12.52%

Answer & Explanation Answer: B) 10.52%

Explanation:

E=e^i-1

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0 3124

Q:

Calculate the periodic interest rate corresponding to 9.5% compounded monthly

A) 0.7916	B) 0.8916
C) 0.9916	D) 0.6916

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