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Q:

Mary is 12 years younger to Pinky. After 3 years, the ratio of their ages will be 5:8. If the present age of Sam is the sum of ages of Mary and Pinky, then what was the age of Sam 15 years back ?

A) 31 years B) 37 years
C) 46 years D) 29 years
 
Answer & Explanation Answer: A) 31 years

Explanation:

Let the present age of Pinky be x years

 

Then the age of Mary is x - 12 years

 

After 3 years,

 

Ratio of  MaryPinky = x - 9x + 3 = 58

 

8x - 72 = 5x +15

 

=> 3x = 87

 

=> x = 29

 

=> Age of Pinky = 29 years

 

=> Age of Mary = 29 - 12 = 17 years

 

Present age of Sam = 29 + 17 = 46

 

Before 15 years Sam age = 46 - 15 = 31 years.

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Filed Under: Problems on Ages
Exam Prep: GATE , CAT , Bank Exams , AIEEE
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Q:

Payments of $2000 and $1000 were originally scheduled to be paid one year and five years, respectively, from today. They are to be replaced by a $1500 payment due four years from today, and another payment due two years from today. The replacement stream must be economically equivalent to the scheduled stream. What is the unknown payment, if money can earn 7% compounded semiannually?

A) 1548 B) 1348
C) 1648 D) 1748
 
Answer & Explanation Answer: C) 1648

Explanation:

FV1 = Future value of $2000, 1 year later
= PV (1+  i)^n

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Filed Under: Compound Interest
Exam Prep: Bank Exams
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Q:

The command to eliminate a table from a database is

A) REMOVE TABLE CUSTOMER; B) UPDATE TABLE CUSTOMER;
C) DELETE TABLE CUSTOMER; D) DROP TABLE CUSTOMER;
 
Answer & Explanation Answer: D) DROP TABLE CUSTOMER;

Explanation:

The SQL DROP TABLE statement is used to remove a table definition and all data, indexes,...

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Filed Under: Database
Exam Prep: AIEEE , Bank Exams
Job Role: Analyst , Bank PO , Database Administration , IT Trainer , Project Manager

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Q:

What device converts light energy to electrical energy?

A) Photodiode B) Photovoltaic cell
C) Thermocouple D) Heliostats
 
Answer & Explanation Answer: B) Photovoltaic cell

Explanation:

what_device_converts_light_energy_to_electrical_energy1555397376.png image

 

A device which is used to convert light energy directly into electrical energy is called as photovoltaic cell or a solar cell.

 

Heliostats convert light energy into heat energy.

 

A thermocouple is a device for measuring temperature.

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Filed Under: Physics
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2 5277
Q:

Which of the following is the lightest metal?

A) Lithium B) Silver
C) Mercury D) Lead
 
Answer & Explanation Answer: A) Lithium

Explanation:

Lithium is the lightest of all the metals due to its low atomic number among metals. It is the lightest solid element.

 

Which_of_the_following_is_the_lightest_metal1552386560.jpg image 

 

Properties ::

 

* It is a soft silvery-white alkali metal.

* Lithium is highly reactive and flammable and is stored in mineral oil.

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Filed Under: Chemistry
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0 5269
Q:

The Wettest place in the world is Cherrapunji (Assam). The Hottest place is

A) Azizia (Libya) B) Ramagundam (India)
C) Stwart Island (New Zealand) D) Kandy (Sri lanka)
 
Answer & Explanation Answer: A) Azizia (Libya)

Explanation:

Temperature as high as 58.7oC has been recorded at this place

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Filed Under: World Geography
Exam Prep: Bank Exams , AIEEE
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Q:

'The Race of my Life' the Autobiography has been co-authored by Milkha Singh's daughter, whose name is ____ ?

A) Sonia Sanwalka B) Mankhia Singh
C) Sanjitia Sardar D) Poonam Dillo
 
Answer & Explanation Answer: A) Sonia Sanwalka

Explanation:
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Filed Under: Books and Authors
Exam Prep: AIEEE , Bank Exams
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13 5252
Q:

Who has been appointed as new Chairman of Indian Railway Board in August 2017 ?

A) Ashwani Lohani B) S. K. Bhagat
C) Akhil Agarwal D) A. K. Mittal
 
Answer & Explanation Answer: A) Ashwani Lohani

Explanation:

Ashwani Lohani is IRSME officer, appointed as new Chairman of the Indian Railway Board soon after A.K. Mittal stepped down from the post. He is former Chairman & Managing Director of Air India.

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Filed Under: General Awareness
Exam Prep: Bank Exams , CAT
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