GATE Questions

Q:

18 as a decimal?

A) 0.375 B) 0.247
C) 0.214 D) 0.125
 
Answer & Explanation Answer: D) 0.125

Explanation:

Here  18 in decimal means 8th part in 1.

We know that 110 = 0.1

Then,   18 = ?

=> ? = 18 x 0.1110= 0.1 x 108= 0.5418= 0.125

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Filed Under: Decimal Fractions
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Q:

Which statement is one component of the cell theory?

A) DNA is the basis of genetic transfer B) All living cells arise from pre-existing cells
C) All cells are composed of same organelles D) Tissues are formed from combinations of cells
 
Answer & Explanation Answer: B) All living cells arise from pre-existing cells

Explanation:

All living cells arise from pre-existing cells is one component of the cell theory.

 

The Cell Theory is one of the basic principles of biology.

 

The Cell Theory states:

1. All living organisms are composed of cells. They may be unicellular or multicellular.

2. The cell is the basic unit of life.

3. Cells arise from pre-existing cells.

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Filed Under: Biology
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Q:

What is 7 + 7 ÷ 7 + 7 × 7 - 7 =

A) 0 B) 42
C) 50 D) 57
 
Answer & Explanation Answer: C) 50

Explanation:

Given 7 + 7/7 + 7 x 7 - 7

By using BODMAS rule,

7 + 1 + 7 x 7 - 7

= 8 + 49 - 7

= 57 - 7

= 50.

 

Hence 7 + 7/7 + 7 x 7 - 7 = 50.

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Filed Under: Mathematical Operations
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Q:

How many black cards are in a deck?

A) 13 B) 26
C) 39 D) 52
 
Answer & Explanation Answer: B) 26

Explanation:

The total cards in the deck are 52. These 52 cards are divided into 4 suits of 13 cards in each suit. Two Red suits and Two black suits.

Red suits :: Heart suit and Diamond suit = 26

Black suits :: Spade suit and Club suit = 26.

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Q:

Warts are contagious.

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

Explanation:

Yes. Warts are contagious.


You can get warts from touching a wart on someone else's body or by coming in contact with surfaces that touched someone's warts, such as towels or bathmats.


warts_are_contagious1532510865.jpg image


 


Hence, the given statement that, 'Warts are contagious' is TRUE.

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Subject: General Science
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Q:

Radioactive decay is likely to occur when

A) an atom has too many neutrons or protons B) protons break into neutrons and electrons
C) an atom has too many electrons D) atoms collide with one another
 
Answer & Explanation Answer: A) an atom has too many neutrons or protons

Explanation:

Radioactive decay is likely to occur when the nuclei of an atom doesn't have enough binding energy to hold the nucleus together due to excess of rotons or nutrons in it.

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Filed Under: Chemistry
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Q:

What is a Contact Force and explain with an example?

Answer

A Contact force is a force applied to a body by another body that is in contact with it. Contact force acts on a point of direct contact between the two objects. This force can either be continuous as a continuous force or can be momentary in the form of an impulse. Contact force is governed by Newton’s Laws.


Examples :: Contact force is responsible for most of the interactions we experience in the daily life.


1. Writing your name with a pen, pushing a car up a hill, lifting an object, etc...


2. Kicking a ball, hammering a nail, etc...


are some of the everyday examples where contact forces are at work.


In the first case, the force is continuously applied by the person on the car or pen or an object while in the second case the force is delivered in a short impulse.


 


Contact forces are often decomposed into orthogonal components


one perpendicular to the surface in contact called the normal force, and


one parallel to the surface in contact, called the friction force.

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

Which continent has the least countries?

A) Africa B) South America
C) Antarctica D) Europe
 
Answer & Explanation Answer: C) Antarctica

Explanation:

Africa - 54 countries

South America - 12 countries

Antarctica - 0 countries

Europe - 43 countries.

 

Hence, Antarctica continent has the least countries.

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