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Q:

The ages of Sunitha and Pranitha are 40 years and 60 years, respectively. How many years before the ratio of their ages was 3 : 5?

A) 10 years B) 15 years
C) 18 years D) 24 years
 
Answer & Explanation Answer: A) 10 years

Explanation:

Given the ages of Sunitha and Pranitha are 40 years and 60 years.

Let before 'm' years, their ages be in the ratio of 3 : 5

ATQ,

40-m60-m = 35

=> 200 - 5m = 180 - 3m

=>2m = 20

=> m = 10 years.

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Filed Under: Problems on Ages
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Q:

Serious dehydration may cause all of the following, EXCEPT

A) muscle cramps B) torn ligaments
C) reduced blood volume D) increased heart rate
 
Answer & Explanation Answer: B) torn ligaments

Explanation:

Serious_dehydration_may_cause_all_of_the_following,_EXCEPT1558508048.jpg image

 

Dehydration is a loss of body fluid that impairs normal bodily functions. Serious dehydration may cause muscle cramps, reduced blood volume and increased heart rate.

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Filed Under: General Science
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Q:

Systems biology is mainly an attempt to

A) simplify complex problems by reducing the system into smaller, less complex units. B) understand the behavior of entire biological systems.
C) analyze genomes from different species. D) speed up the technological application of scientific knowledge.
 
Answer & Explanation Answer: B) understand the behavior of entire biological systems.

Explanation:

Systems biology is mainly an attempt to understand the behavior of entire biological systems by studying interactions among its component parts.

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Q:

Sources of geothermal power are

A) water B) earth's heat
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Geothermal power plants are used in order to generate electricity by the use of geothermal energy (the Earth's internal thermal energy). They essentially work the same as a coal or nuclear power plant, the main difference being the heat source.

geothermal_power1531899280.png image

Geothermal power plants use hydrothermal resources that have both water (hydro) and heat (thermal). Geothermal power plants require high-temperature (300°F to 700°F) hydrothermal resources that come from either dry steam wells or from hot water wells.

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Filed Under: Physics
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Q:

What lump sum deposited today would allow payments of $2000/year for 7 years at 5% compounded annually?

A) 11572.71 B) 11876
C) 189756 D) 11576
 
Answer & Explanation Answer: A) 11572.71

Explanation:

 

 

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

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Filed Under: Compound Interest
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Q:

If 133 = 20, 127 = 10 and 125 = 14 then find the value of 162?

A) 14 B) 4
C) 28 D) 8
 
Answer & Explanation Answer: C) 28

Explanation:
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Q:

The sum of the first 10 prime numbers is

A) even B) odd
C) 0 D) none
 
Answer & Explanation Answer: B) odd

Explanation:

To find the sum of first 10 prime numbers

First 10 prime numbers = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

 

Hence, The sum of the first 10 prime numbers is

(2+3+5+7+11+13+17+19+23+29) = 129 (ODD Number).

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Filed Under: Arithmetical Reasoning
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Q:

Which among the following is not correctly matched pair?

A) Pakistan- Field Hockey B) China- Table Tennis
C) USA- Baseball D) None of the above
 
Answer & Explanation Answer: D) None of the above

Explanation:

In all the given options, the countries are correctly matched with their National games.

 

USA - Baseball


Pakistan - Field Hockey


China - Table Tennis.

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