Common Admission Test (CAT) Questions and Answers with Explanation

Q:

Which one of the following is a natural colloid ?

A) Cane sugar solution	B) Blood
C) Sodium chloride solution	D) Urea solution

Answer & Explanation Answer: B) Blood

Explanation:

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Filed Under: Chemistry
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26 9939

Q:

You organize files by storing them in

A) Lists	B) Archives
C) Folders	D) Indexes

Answer & Explanation Answer: C) Folders

Explanation:

Files are organised and stored in folders.

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Filed Under: Computer
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17 9925

Q:

What is the antonym of "Censure" ?

A) commend	B) augment
C) enthral	D) reform

Answer & Explanation Answer: C) enthral

Explanation:

"Censure" means expressing formal disapproval. "Enthral" means spellbound or enchant, which is farthest in meaning to the given word.

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Filed Under: Analogy
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25 9922

Q:

Excretion is best described as the removal of

A) Undigested material from the digestive tract	B) Metabolic wastes from a cell
C) Toxic wastes by the process of cyclosis	D) Water molecules from dipeptide hydrolysis

Answer & Explanation Answer: B) Metabolic wastes from a cell

Explanation:

Excretion is best described as the removal of Metabolic wastes from a cell.

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Filed Under: Biology
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21 9920

Q:

Running 3/4th of his usual rate, a man is 15min late. Find his usual time in hours ?

A) 2/3 hrs	B) 3/4 hrs
C) 1/3 hrs	D) 1/4 hrs

Answer & Explanation Answer: B) 3/4 hrs

Explanation:

Walking at 3/4th of usual rate implies that time taken would be 4/3th of the usual time. In other words, the time taken is 1/3rd more than his usual time

so 1/3rd of the usual time = 15min
or usual time = 3 x 15 = 45min = 45/60 hrs = 3/4 hrs.

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Filed Under: Time and Distance
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5 9904

Q:

Find the principal if the interest compounded at the rate of 10% per annum for two years is Rs. 420 ?

A) Rs. 2000	B) Rs. 2100
C) Rs. 1900	D) Rs. 2150

Answer & Explanation Answer: A) Rs. 2000

Explanation:

Given,
Compound rate, R = 10% per annum
Time = 2 years
C.I = Rs. 420
Let P be the required principal.
A = (P+C.I)
Amount, A = $P {(1 + (\frac{r}{100}))}^{n}$

(P+C.I) = $P {[1 + (\frac{10}{100})]}^{2}$

(P+420) = P[11/10][11/10]

P-1.21P = -420

0.21P = 420

Hence, P = 420/0.21 = Rs. 2000

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Filed Under: Compound Interest
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7 9900

Q:

A boat travels 72 km downstream in 8 hours and 84 km upstream in 12 hours. Find the speed of the boat in still water and the speed of the water current ?

A) 9 and 3 kmph	B) 6 and 7 kmph
C) 8 and 1 kmph	D) 7 and 2 kmph

Answer & Explanation Answer: C) 8 and 1 kmph

Explanation:

Downstream speed = 72km/8hrs = 9 kmph
upstream speed = 84km/12hrs = 7 kmph
speed of boat = avg of downstream and upstream speeds
speed of boat = (9+7)/2kmph = 8 kmph.
current speed = half of the difference of downstream and upstream speeds
currend speed = (9-7)/2kmph = 1 kmph

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Filed Under: Boats and Streams
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19 9898

Q:

If 35% of a number is 24 less than 50% of that number, then the number is ?

A) 80	B) 160
C) 100	D) 120

Answer & Explanation Answer: B) 160

Explanation:

Let the number be n. Then,

50% of n - 35% of n = 24

50/100 n - 35/100 n = 24

n = (24 x 100)/15 = 160.

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Filed Under: Percentage
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8 9896

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