GATE Questions

Q:

The difference of squares of two numbers is 180. The square of the smaller number is 8 times the larger number. Find two numbers.

A) 10 & 12 B) 10 & 18
C) 12 & -18 D) -12 & 18
 
Answer & Explanation Answer: D) -12 & 18

Explanation:

Given, difference of the squares of two numbers is 180.

k2 - l2 - 180

 

Also, square of the smaller number is 8 times the larger.

= l= 8k

 

Thus, k2 - 8a - 180 = 0

k2 – 18k + 10k - 180 = 0

→  k(k - 18) + 10(k – 18) = 0

= (k + 10)(k – 18) = 0

→  k = -10, 18

 

Thus, the other number is

324 - 180 = l2 

 

→ Numbers are 12, 18 or -12, 18.

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Filed Under: Numbers
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Q:

The combined gas law relates which of the following?

A) Volume & Temperature B) Temperature & Pressure
C) Volume & Pressure D) Volume, Temperature & Pressure
 
Answer & Explanation Answer: D) Volume, Temperature & Pressure

Explanation:

The combined gas law states that the ratio between the pressure-volume product and the temperature of a system remains constant.

 

Hence it depends on all the three Volume, Temperature & Pressure.

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Filed Under: Physics
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Q:

The concept of due process refers to

A) banking B) justice
C) politics D) economy
 
Answer & Explanation Answer: B) justice

Explanation:

Due process is the legal requirement that the state must respect all legal rights that are owed to a person.

Therefore, due process refers to the criminal justice system operating within the bounds of the law.

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Filed Under: Indian Politics
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Q:

What is the reciprocal of a negative number?

Answer

The reciprocal of a negative number is always a negative number. So that the number and its reciprocal multiply to 1. 


 


All real numbers except 0 have reciprocals.

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Subject: Arithmetical Reasoning Exam Prep: AIEEE , Bank Exams , CAT , GATE
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Q:

Which of the following industries most closely approximates pure competition?

A) Steel B) Clothing
C) Eectronic D) Agriculture
 
Answer & Explanation Answer: D) Agriculture

Explanation:

Agriculture would be a good example of a purely competitive industry.

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Filed Under: General Science
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Q:

50 men can complete a work in 28 days. They started the work together, but at the end of each 10th day, 10 men left the job. The work was completed in how many days?

A) 36 B) 38
C) 40 D) 45
 
Answer & Explanation Answer: C) 40

Explanation:
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Filed Under: Time and Work
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Q:

Are Alternate Exterior Angles congruent?

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

We know that,


Alternate Exterior Angles Theorem::


The Alternate Exterior Angles Theorem states that, when two parallel lines are cut by a transversal, the resulting alternate exterior angles are congruent .



Converse of the Alternate Exterior Angles Theorem ::


Converse of the Alternate Exterior Angles Theorem states that, If two lines are cut by a transversal and the alternate exterior angles are congruent, then the lines are parallel.

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Subject: Arithmetical Reasoning
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Q:

Rs.7750 is divided among X, Y and Z such that 3 times of X's share is equal to 5 times of Y's share which is equal to 2 times of Z's share. What is the share (in Rs) of Z?

A) 4250 B) 3750
C) 3875 D) 4475
 
Answer & Explanation Answer: B) 3750

Explanation:
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Filed Under: Simplification
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