CAT Questions

Q:

If 1/a+1/b+1/c = 1/(a+b+c) where a+b+c not equals '0', abc not equals '0', What is the value of (a+b) (b+c) (a+c) ?

A) 3 B) 2
C) 1 D) 0
 
Answer & Explanation Answer: D) 0

Explanation:

Let assume the value of a,b &c that will satisfy the equation.
so a=1,b=1,c= -1 or a=1,b= -1 &c=1 or a= -1,b=1,c=1
here all three cases satisfy the equation
assume any one a=1,b=1,c= -1

Hence (a+b)(b+c)(c+a)=(1+1)(1-1)(-1+1) = 0

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Filed Under: Numbers
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5 3643
Q:

In which layer is the pressure the highest?

A) Ionosphere B) Stratosphere
C) Troposphere D) Inner core
 
Answer & Explanation Answer: D) Inner core

Explanation:

"Pressure" is the ratio of mass to area. So, for any given area, the one with more mass pressing on it will experience a higher pressure.

 

As you go more deeply into the atmosphere OR earth itself, you are putting more and more mass over you. For the same unit area therefore, the pressure, (mass/area) increases.

 

Hence, the lowest layer will always have the highest pressure i.e, inner core.

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Filed Under: Physics
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2 3641
Q:

Which of the following is biodegradable?

A) Iron nails B) DDT
C) Silver foil D) Leather bags
 
Answer & Explanation Answer: D) Leather bags

Explanation:

Biodegradable substances can be broken down into simpler, harmless substances in nature with due course of time by the biological process such as action of microbes. They can be recycled as a part of food chain.

 

Here, Leather bags are biodegradable.

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Q:

Size of the primary memory of a pc ranges between

A) 256 kb to 640 kb B) 64 kb to 256 kb
C) 256 kb to 512 kb D) 2 kb to 8 kb
 
Answer & Explanation Answer: A) 256 kb to 640 kb

Explanation:

Size of the primary memory of a PC ranges between 256 KB to 640 KB.

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6 3639
Q:

What is the chemical name for vitamin A?

A) Retinol B) Riboflavin
C) Thiamine D) Niacin
 
Answer & Explanation Answer: A) Retinol

Explanation:

Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, retinoic acid, and several provitamin A carotenoids.

IUPAC Name :: (2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraen-1-ol

 

Vitamin Name - Chemical Name

Vitamin A   -     Retinol

Vitamin B1  -    Thiamine

Vitamin B2  -    Riboflavin

Vitamin B3  -    Niacin

Vitamin B5  -    Pantothenic acid

Vitamin B6  -    Pyridoxin

Vitamin B7  -    Biotin

Vitamin B9  -    Folic acid

Vitamin B12  -   Cyanocobalamin

Vitamin C     -   Ascorbic acid

Vitamin D     -   Calciferol

Vitamin E      -   Tocoferol

Vitamin K      -   Phylloquinone and Menaquinones

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Filed Under: General Science
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5 3638
Q:

India Ratings has lowered India's growth forecast for the current fiscal to ________ from 7.4 per cent.

A) 6.3 per cent B) 6.6 per cent
C) 6.7 per cent D) 6.4 per cent
 
Answer & Explanation Answer: C) 6.7 per cent

Explanation:
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Filed Under: Indian Economy
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15 3638
Q:

From which direction does foul weather typically approach?

A) East B) North
C) West D) South
 
Answer & Explanation Answer: C) West

Explanation:

If the barometer rises, it indicates that good or fair weather is coming and if the falling barometer reading indicates that bad or foul weather is coming. Usually bad weather approaches from the west direction.

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Filed Under: General Science
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1 3637
Q:

A certain sum is invested for 2 years in scheme M at 20% p.a. compound interest (compounded annually), Same sum is also invested for the same period in scheme N at k% p.a. simple interest. The interest earned from scheme M is twice of that earned from scheme N. What is the value of k?

A) 7 B) 11
C) 9 D) 13
 
Answer & Explanation Answer: B) 11

Explanation:

Interest earned in scheme M =   

P1 + 201002  - 1  = 11P25

Interest earned in scheme N =  

P x k x 2100 = Pk50

 

Now, from the given data,

 

11P25 = 2 x Pk50

k = 11

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Filed Under: Compound Interest
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