CAT Questions

Q:

The number of signals that can be generated by using 5 differently coloured flags, when any number of them may be hoisted at a time is:

A) 235 B) 253
C) 325 D) None of these
 
Answer & Explanation Answer: C) 325

Explanation:

Required number of signals = 5P1 + 5P2 + 5P3 + 5P4 + 5P5

= 5 + 20 + 60 + 120 + 120 = 325

 

 

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Filed Under: Permutations and Combinations
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4 6412
Q:

Rajitha's present age is three years less than twice her age 12 years ago. Also, the ratio of Raj's present age to Rajitha's present age is 4:9. What will be Raj's age after 5 years ?

A) 17 yrs B) 16 yrs
C) 19 yrs D) 21 yrs
 
Answer & Explanation Answer: A) 17 yrs

Explanation:

Let the present age of Raj and Rajitha be 4x and 9x.
Then, according to question,
9x = 2(9x-12)-3 => 9x = 27 => x = 3
Raj's present age = 4x = 12yrs,
After 5 years Raj's age will be 12 + 5 = 17 yrs.

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Filed Under: Problems on Ages
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5 6409
Q:

Solve the Missing Number Challenge ?

17795735_1259876897452745_3803444596261153403_n1500008952.jpg image

A) 5 B) 1
C) 10 D) 2
 
Answer & Explanation Answer: B) 1

Explanation:

Logic is

1st fig : 9x2 + 5 = 23

2nd fig : 6x3 + 4 = 22

3rd fig : Nx4 + 5 = 9 => N = 1.

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Filed Under: Number Puzzles
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23 6404
Q:

Which term best describes how the solar system formed?

A) Electrically B) Gradually
C) Chemically D) Rapidly
 
Answer & Explanation Answer: B) Gradually

Explanation:

All of us, believe that the Solar System evolved from a giant cloud of dust and gas. They believe that this dust and gas began to collapse under the weight of its own gravity. As it did so, the matter contained within this could begin moving in a giant circle, much like the water in a drain moves around the center of the drain in a circle.

solar_system_formation1532070182.jpg image

At the center of this spinning cloud, a small star began to form. This star grew larger and larger as it collected more and more of the dust and gas that collapsed into it.

Further away from the center of this mass where the star was forming, there were smaller clumps of dust and gas that were also collapsing. The star in the center eventually ignited forming our Sun, while the smaller clumps became the planets, minor planets, moons, comets, and asteroids.

 

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Filed Under: General Science
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5 6404
Q:

Cryogenic Engines find applications in

A) Frost - Free refrigerators B) Sub-marine propulsion
C) Researches in superconductivity D) Rocket technology
 
Answer & Explanation Answer: D) Rocket technology

Explanation:

Cryogenic Engines find applications in Rocket technology. A cryogenic rocket engine is a rocket engine that uses a cryogenic fuel or oxidizer, that is, its fuel or oxidizer are gases liquefied and stored at very low temperatures. Notably, these engines were one of the main factors of NASA's success in reaching the Moon by the Saturn V rocket.

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Filed Under: Physics
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2 6400
Q:

The sum of the digits of a two-digit number is 12. The difference of the digits is 6. Find the number ?

A) 57 B) 75
C) 48 D) 39
 
Answer & Explanation Answer: D) 39

Explanation:

Let the two-digit number be 10a + b
a + b = 12 --- (1)
If a>b, a - b = 6
If b>a, b - a = 6
If a - b = 6, adding it to equation (1), we get
2a = 18 => a =9
so b = 12 - a = 3
Number would be 93.
if b - a = 6, adding it to the equation (1), we get
2b = 18 => b = 9
a = 12 - b = 3.
Number would be 39.
There fore, Number would be 39 or 93.

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Filed Under: Problems on Numbers
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7 6398
Q:

Where are Alluvial Soils found in India?

Answer

 


1. In India Alluvial Soils are most likely found in Indo-Gangetic Plains that stretches across almost East and North India. 


 


2. Indo-Gangetic Plains has got this name after the two rivers The Indus and The Ganges Drain th plain.


 


3. These soil cover more than the 35% of the total land in India.


 


4. These Soils are suitable for Wheat, Vegetables, Cotton, Bajra, Oil seeds,...


 


5. These soils tend to be sandier and has quick draining properties than many other soils in India.

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Subject: Indian Geography Exam Prep: CAT , Bank Exams , AIEEE
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20 6396
Q:

Galaxy named after Greek princess

A) Andromeda B) Whirlpool
C) Messier D) Cygnus
 
Answer & Explanation Answer: A) Andromeda

Explanation:

Andromeda Galaxy is the galaxy named after Greek princess Andromeda.

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Filed Under: General Science
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3 6394