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Q:

A sum of Rs. 8,000 is deposited for 3 years at 5% per annum compound interest (compounded annually). The difference of interest for 3 years and 2 years will be

A) Rs. 387	B) Rs. 441
C) Rs. 469	D) Rs. 503

Answer & Explanation Answer: B) Rs. 441

Explanation:

Given principal amount = Rs. 8000

Time = 3yrs

Rate = 5%

C.I for 3 yrs = $8000 x \frac{105}{100} x \frac{105}{100} x \frac{105}{100} - 8000 = Rs . 1261$

Now, C.I for 2 yrs = $8000 x \frac{105}{100} x \frac{105}{100} = Rs . 820$

Hence, the required difference in C.I is 1261 - 820 = Rs. 441

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Filed Under: Compound Interest
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Q:

M, N and O can complete the work in 18, 36 and 54 days respectively. M started the work and worked for 8 days, then N and O joined him and they all worked together for some days. M left the job one day before completion of work. For how many days they all worked together?

A) 4	B) 5
C) 3	D) 6

Answer & Explanation Answer: B) 5

Explanation:

Let M, N and O worked together for x days.

From the given data,
M alone worked for 8 days
M,N,O worked for x days
N, O worked for 1 day

But given that
M alone can complete the work in 18 days
N alone can complete the work in 36 days
O alone can complete the work in 54 days

The total work can be the LCM of 18, 6, 54 = 108 units

M's 1 day work = 108/18 = 6 units
N's 1 day work = 108/36 = 3 units
O's 1 day work = 108/54 = 2 units

Now, the equation is
8 x 6 + 11x + 5 x 1 = 108
48 + 11x + 5 = 108
11x = 103 - 48
11x = 55
x = 5 days.

Hence, all M,N and O together worked for 5 days.

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Filed Under: Time and Work
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Q:

A seven letter word containing thousands of letters is what?

Answer

It is a Postbox or a Mailbox which contains thousands of letters or mails or messages.

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Subject: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
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Q:

What is the relationship between Resistivity and Conductivity?

Answer

Resistivity :

Resistivity is a measure of the resistance to the flow of electrons.

Conductivity :

Conductivity is just the inverse of resistivity, σ = 1/ρ, where σ is conductivity and ρ is resistivity.

Example:

Think of a pipe and water, the bigger the pipe, the easier water can flow and thus the lower the resistance.

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Subject: Physics Exam Prep: AIEEE , Bank Exams , CAT , GATE
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Q:

What has a neck but no head and wears a cap?

Answer

A bottle has a neck but no head and wears a cap.

what_has_a_neck_but_no_head1603889734.jpg image

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Q:

What frequency range is the high frequency band?

A) 3 kHz	B) 3 to 30 MHz
C) 30 to 300 MHz	D) 10 GHz

Answer & Explanation Answer: B) 3 to 30 MHz

Explanation:

The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.

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Filed Under: Physics
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Q:

In e-FRRO, 'FRRO' stands for?

A) Foreigners Reacceptance Registration Office	B) Foreigners Regional Registration Office
C) Foreigners Regaining Registration Office	D) Foreigners Registry Registration Office

Answer & Explanation Answer: B) Foreigners Regional Registration Office

Explanation:

Home Minister Rajnath Singh launched the web-based application e-FRRO (e-Foreigners Regional Registration Office) scheme under which foreigners can avail, various visa and immigration-related services online. This will facilitate hassle-free travel to India for foreigners.

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Filed Under: General Awareness
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Q:

Alone I am 24th, with a friend I am 20. Another friend and I am unclean. What am I?

Answer

The answer is 'X'.

1. It is the 24th letter in the alphabetical order.

2. XX (20 in Roman)

3. XXX is used to refer dirty.

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Subject: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE , TOEFL
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