GATE Questions

Q:

6 : 18 :: 4 : ?

A) 14 B) 6
C) 16 D) 8
 
Answer & Explanation Answer: D) 8

Explanation:

Here the given number analogy follows two patterns that,

18 --> 6 x 3

4

12 --> 4 x 3

 

OR

6

18 ----> 6x6/2 = 18

4

8 ----> 4x4/2 = 8

 

As 12 is not available in the options, 8 is correct answer.

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Filed Under: Analogy
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179 38557
Q:

Which pair of atoms has the highest electronegativity difference?

 

(Calcium's electronegativity is 1.0

Fluorine's electronegativity is 4.0

Hydrogen's electronegativity is 2.2

Sodium's electronegativity is 0.93)

A) F-F B) Ca-F
C) H-F D) Na-F
 
Answer & Explanation Answer: D) Na-F

Explanation:

F-F = 4 - 4 = 0

Ca-F = 4 - 1 = 3.0

H-F = 4 - 2.2 = 1.8

Na-F = 4 - 0.93 = 3.07

 

Hence, the highest electronegativity difference is in Na-F.

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Filed Under: Chemistry
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12 38358
Q:

Mg+O2=MgO

Balance the above Chemical equation?

A) 2Mg + O2 ----> 2MgO B) 2Mg + O ----> 2MgO
C) 2Mg + O ----> MgO2 D) 2Mg + O2 ----> MgO2
 
Answer & Explanation Answer: A) 2Mg + O2 ----> 2MgO

Explanation:

Given Equation is 

Mg + O2  MgO

Balancing the Chemical Equation is nothing but Conservation of Matter. As Matter is Neither created nor Destroyed, it must be conserved.

Here we have 1 Mg and 2 O on the left side and 1 Mg and 1 O on the right side

To balance that, add 1 Mg on the left side so that it becomes 2 Mg and 2 O on the left side

i.e,

2 Mg + O2  2 MgO

Here it has 2 Mg & 2 O on the left side and 2 Mg and 2 O on the right side and the Chemical equation is Balanced.

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Filed Under: Chemistry
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31 38082
Q:

Complete the Analogy?

 

Grain : Stock :: Stick : ?

A) Bundle B) String
C) Collection D) Heap
 
Answer & Explanation Answer: A) Bundle

Explanation:

Here the relation between the given words is that the second word is the collection of the first word.

As the collection of grains is called Stock, similarly, the collection of sticks is called as Bundle.

 

Hence, Grain : Stock :: Stick : Bundle.

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Filed Under: Analogy
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17 37995
Q:

Select the four statements about Plasmodium that are true.

 

A)  Inside an infected mosquito, haploid gametes fuse, forming a diploid zygote that develops into an oocyst

B) Plasmodium cells infect two specific types of cells in humans.

C) Inside an infected mosquito, haploid gametes fuse, forming a haploid zygote that develops into an oocyst.

D) When a mosquito bites a human with malaria, diploid Plasmodium cells enter the mosquito.

E) Plasmodium cells are transferred to humans through mosquito saliva.

F) The life cycle of Plasmodium involves only haploid forms.

G) The complete life cycle of Plasmodium requires two hosts.

A) A, B, E, G B) A, C, F, G
C) B, C, D, F D) None of the above
 
Answer & Explanation Answer: A) A, B, E, G

Explanation:

Plasmodium is a genus of unicellular eukaryotes that are obligate parasites of vertebrates and insects. 

From the above given options, A, B, E, G are TRUE regarding Plasmodium.

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Filed Under: General Science
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28 37659
Q:

3 men, 4 women and 6 children can complete a work in 7 days. A woman does double the work a man does and a child does half the work a man does. How many women alone can complete this work in 7 days  ?

A) 6 B) 9
C) 5 D) 7
 
Answer & Explanation Answer: D) 7

Explanation:

Let 1 woman's 1 day work = x.

Then, 1 man's 1 day work = x/2 and 1 child's 1 day work  x/4.

So, (3x/2 + 4x + + 6x/4) = 1/7

28x/4 = 1/7 => x = 1/49

1 woman alone can complete the work in 49 days.

So, to complete the work in 7 days, number of women required = 49/7 = 7.

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Filed Under: Time and Work
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83 37413
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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70 37200
Q:

In a certain code language

" given  time  simple  plan " is written as ' @E4  &N4  %N5  #E6 '

" tired  solution  plant  great " is written as ' #N8  @D5  %T5  &T5 '

" sick  point  good  turn " is written as ' #K4  %D4  @N4  &T5 '

" garden  sister  phone  team " is written as ' &E5  #R6  %N6  @M4 '

Which of the following code is for ' plan ' and ' translate ' ?

A) @E8 and &N5 B) &N4 and @E9
C) @E1 and &N4 D) &N4 and @D7
 
Answer & Explanation Answer: B) &N4 and @E9

Explanation:

plan is given in first step. Total count of letters is 4 and last letter is N and ‘p’ is coded as & so Final answer will be-  &N4

We have to find 'translate' code. As we can see that this word is not given in any steps but as we know the idea of that so we can solve it.

Step I: first we will count the letters of that word that is 9, then we put digit 9 at the right end.

Step II: we will put the last letter of that word then it will like- E9

Step III: at the last step ‘t’ is coded for ‘@’(first letter of each word is coded by a specific symbol like here ‘t’ is coded for ‘@’. We can find the first coded symbol by looking at the other given words.

Answer will be - @E9

 

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Filed Under: Coding and Decoding
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88 37193