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Q:

Raghu can do a job in 12 days alone and Sam can do the same job in 15 days alone. A third person Aru whose efficiency is two-third of efficiency of both Ram and Shyam together, can do the same job in how many days alone?

A) 10 B) 12
C) 13 D) 15
 
Answer & Explanation Answer: A) 10

Explanation:

One day work of Raghu and Sam together = 1/12 + 1/15 = 9/60 = 3/20

Aru efficiency = 2/3 of (Raghu + Sam)

Number of days required for Aru to do thw work alone = 3/2 x 20/3 = 10 days. 

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Filed Under: Time and Work
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Q:

How many four digits numbers greater than 6000 can be made using the digits 0, 4, 2, 6 together with repetition.

A) 64 B) 63
C) 62 D) 60
 
Answer & Explanation Answer: B) 63

Explanation:

Given digits are 0, 4, 2, 6

Required 4 digit number should be greater than 6000.

So, first digit must be 6 only and the remaining three places can be filled by one of all the four digits.

This can be done by

1x4x4x4 = 64

Greater than 6000 means 6000 should not be there.

Hence, 64 - 1 = 63.

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Filed Under: Permutations and Combinations
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Q:

Heat transfer horizontally within the atmosphere is called

A) Convection B) Advection
C) Conduction D) Absorption
 
Answer & Explanation Answer: B) Advection

Explanation:
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Filed Under: General Science
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Q:

Who are the primary users of SCM systems?

A) Accounting, finance, logistics, and production B) Customers, resellers, partners, suppliers, and distributors
C) Sales, marketing, customer service D) All of the above
 
Answer & Explanation Answer: B) Customers, resellers, partners, suppliers, and distributors

Explanation:
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Filed Under: Computer
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Q:

Who was primarily responsible for the cold war?

A) U.S B) Soviet Union
C) Both A & B D) None of the above
 
Answer & Explanation Answer: B) Soviet Union

Explanation:
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Filed Under: World History
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Q:

When should you discard a PFD?

A) When it is too small B) When its been used 1 year
C) When its been used 1 month D) When it has a torn strap
 
Answer & Explanation Answer: D) When it has a torn strap

Explanation:

Personal flotation devices (PFDs), have life span upto it is damaged. Hence, When it has a torn strap you should discard a PFD.

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Filed Under: General Awareness
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Q:

During what stage of photosynthesis is O2 produced?

A) Photosystem 1 B) Photosystem 2
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Photosynthesis is the process that converts solar energy into chemical energy. During the stage of light-dependent reactions involving photosystems I and II in photosynthesis, O2 produced.

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Filed Under: General Awareness
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Q:

12 men complete a work in 14 days. 5 days after they had started working, 3 men join them. How many more days will all of them take to complete the remaining work?

A) 5 B) 4
C) 3 D) 2
 
Answer & Explanation Answer: C) 3

Explanation:

Let p be the required number of days.

From the given data,

12 x 14 = 12 x 5 + (12+3) x p 

12 x 14 = 12[5 + 3p]

14 = 5 + 3p

3p = 9

p = 3 days.

 

Hence, more 3 days all of them take to complete the remaining work.

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Filed Under: Time and Work
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