GATE Questions

Q:

The third proportional to 9 and 12 is ?

A) 14 B) 16
C) 18 D) 20
 
Answer & Explanation Answer: B) 16

Explanation:

Let the third proportion to 9 & 12 be 'x'.

=> 9:12 = 12 :p

=> p = 12x12/9 = 16.

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Filed Under: Ratios and Proportions
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167 38179
Q:

P, Q, R, S, T, U, V and W are sitting round the circle and are facing the centre:
P is second to the right of T who is the neighbour of R and V.
S is not the neighbour of P.
V is the neighbour of U.
Q is not between S and W. W is not between U and S.

Then Who is sitting opposite to U ?

A) Q B) P
C) R D) W
 
Answer & Explanation Answer: B) P

Explanation:

From the given information, the sitting arrangement can be

 P-Q-W-S-U-V-T-R  i.e. in circular as

p11487572312.jpg image

From the above figure it is clear that opposite to U is P.

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81 38109
Q:

8, 15, 28, 53, ?, 199

A) 101 B) 102
C) 103 D) 104
 
Answer & Explanation Answer: B) 102

Explanation:

Here the series of the form is x2 - 1, x2 - 2, x2 - 3,...

 53 x 2 - 4 = 106 - 4 = 102

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Filed Under: Number Series
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321 37993
Q:

Correction of sentences:

What your Sirname is?

A) What your Sirname? B) What is your Sirname?
C) Your Sirname is what? D) None of the above
 
Answer & Explanation Answer: B) What is your Sirname?

Explanation:

'What is your Sirname?' is the correct sentence of the given sentence in English grammar.

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Filed Under: English
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22 37878
Q:

What comes next in this sequence

196, 169, 144, 121, 100, 81, ?

A) 77 B) 74
C) 67 D) 64
 
Answer & Explanation Answer: D) 64

Explanation:

The given number series follows a pattern that

196, 169, 144, 121, 100, 81, ?

    -27  -25   -23   -21  -19  -17

 

=> 81 - 17 = 64

Therefore, the series is 196, 169, 144, 121, 100, 81, 64.

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Filed Under: Odd Man Out
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22 37765
Q:

A man reaches his office 20 min late, if he walks from his home at 3 km per hour and reaches 30 min early if he walks 4 km per hour. How far is his office from his house ?

A) 20 km B) 16 km
C) 14 km D) 10 km
 
Answer & Explanation Answer: D) 10 km

Explanation:

Let distance = x km.
Time taken at 3 kmph : dist/speed = x/3 = 20 min late.
time taken at 4 kmph : x/4 = 30 min earlier
difference between time taken : 30-(-20) = 50 mins = 50/60 hours.
x/3- x/4 = 50/60
x/12 = 5/6
x = 10 km.

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Filed Under: Time and Distance
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53 37215
Q:

Ram sell his goods 25% cheaper than Shyam and 25% dearer than Bram. How much % is Bram's good cheaper than Shyam ?

A) 60% B) 40%
C) 50% D) 30%
 
Answer & Explanation Answer: B) 40%

Explanation:

Lets say shyam sells at 100,

 

Since Ram sells 25% cheaper than Shyam,

 

Therefor Ram sells at less than 25% of100 or 75 rs.

 

Ram sells 25% dearer than Bram or 125% of Ram =100% of Bram or

 

125% of x (say x price of bram )=75rs.
or 100% of x =60rs.
hence price of bram is 60rs.

 

now Bram's good is cheaper than Shyam's as (100-60)x100/100% or 40%.

 

Hence Brams Good is 40% cheaper than that of Shyam's good.

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Filed Under: Percentage
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77 37157
Q:

Thread is to String as Cask is to

A) Barrel B) Disc
C) Wallet D) Box
 
Answer & Explanation Answer: A) Barrel

Explanation:

Here Thread and String are Synonyms of each other. Then the answer will be the synonym of Cask. 

  • Cask is nothing but a large barrel-like container used for storing liquids, typically alcoholic drinks. 

Ex : Drum, Vessel, Tank, Barrel, Hogshead, Firkin,...

 

  • Here from the options Barrel is the only synonym of Cask.

 

Thus,  Thread : String :: Cask : Barrel

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Filed Under: Analogy
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45 37113