CAT Questions

Q:

The book "Two Year Eight Months and Twenty –Eight Night" is authored by

A) Salman Rushdi B) Deepak Nayyar
C) Javier Moro D) Khurshid M Kasuari
 
Answer & Explanation Answer: A) Salman Rushdi

Explanation:
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Q:

What is the sum of all 3 digits number that can be formed using digits 0,1,2,3,4,5 with no repitition ?

A) 28450 B) 26340
C) 32640 D) 36450
 
Answer & Explanation Answer: C) 32640

Explanation:

We know that zero can't be in hundreds place. But let's assume that our number could start with zero.

 

The formula to find sum of all numbers in a permutation is

 

111 x no of ways numbers can be formed for a number at given position x sum of all given digits

 

No of 1 s depends on number of digits

 

So,the answer us

 

111 x 20 x (0+1+2+3+4+5) = 33300

 

We got 20 as follows. If we have 0 in units place we can form a number in 4*5 ways. This is for all numbers. So we have substituted 20 in formula.

 

Now, this is not the final answer because we have included 0 in hundreds place. so we have to remove the sum of all numbers that starts with 0.

 

This is nothing but the sum of all 2 digits numbers formed by 1 2 3 4 5. Because 0 at first place makes it a 2 digit number.

 

So the sum for this is 11 x 4 x (1+2+3+4+5).
=660

 

Hope u understood why we use 4. Each number can be formed in 4x1 ways

 

So, the final answer is 33300-660 = 32640

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Q:

Which of the following has introduced ‘style ideas’ on its Android app and web based search for fashion content ?

A) Amazon B) Flipkart
C) GOOGLE D) Microsoft
 
Answer & Explanation Answer: C) GOOGLE

Explanation:

To enhance user experience when searching for fashion content, Google on Thursday introduced a new feature called “style ideas” in Image Search on mobile web and in Google app for Android. “Style ideas” throws up high-quality images that show how someone will look while wearing or carrying the item you searched for.

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Q:

Which scientist established the Law of Octaves?

A) John Newlands B) Antoine Lavoisier
C) Alfred Nobel D) Marie Curie
 
Answer & Explanation Answer: A) John Newlands

Explanation:

Law of Octaves states that "If the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements." That is every 8th element have the same physical and chemical properties. This was established by the British scientist John Newlands in the year 1865.

Which_scientist_established_the_Law_of_Octaves1559374791.jpg image

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Q:

Which Indian state shares the most borders with other states?

A) Uttarakhand B) Rajasthan
C) Madhya Pradesh D) Uttar Pradesh
 
Answer & Explanation Answer: D) Uttar Pradesh

Explanation:

Uttar Pradesh is the Indian state which share the most borders with 9 different states.

 

Neighbouring States of Uttar Pradesh –

Uttarakhand and Himachal Pradesh in northwest,

Delhi, Haryana and Rajasthan in west,

Madhya Pradesh in south,

Chhattisgarh in southeast,

Bihar and Jharkhand in east.

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Q:

What is meant by demography?

A) The well being of populations B) Growth of population
C) Birth and death of population D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

The study of statistics such as births, deaths, income, or the incidence of disease, which illustrate the changing structure of human populations.

 

In brief, Study of both quantitative and qualitative aspects of human population.

1. Quantitative aspects include composition, density, distribution, growth, movement, size, and structure of the population.

2. Qualitative aspects are the sociological factors such as education quality, crime, diet, development, nutrition, wealth and well being.

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Q:

The folk dance of which state is Kargam?

A) Tamil Nadu B) Andhra Pradesh
C) Kerala D) Odisha
 
Answer & Explanation Answer: A) Tamil Nadu

Explanation:

Kargam is the folk dance of Tamil Nadu state.

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Q:

Which statement is true about blood alcohol concentration?

A) The higher the blood alcohol concentration, the more severe the hangover will be. B) Drinking coffee and exercising will lower your blood alcohol concentration.
C) Blood alcohol concentration is affected by factors such as body size and gender. D) None of the above
 
Answer & Explanation Answer: C) Blood alcohol concentration is affected by factors such as body size and gender.

Explanation:

Blood alcohol concentration is affected by factors such as body size and gender. Women are usually smaller than men, and that they turn out less of the enzyme that breaks down alcohol.

 

For those reasons, most girls can have a higher BAC than the typical male if they each drink an identical quantity of alcohol.

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