197
Q:

What is the number of triangles that can be formed whose vertices are the vertices of an octagon but have only one side common with that of octagon?

A) 64 B) 32
C) 24 D) 16

Answer:   B) 32



Explanation:

  

 

When the triangles are drawn in an octagon with vertices same as those of the octagon and having one side common to that of the octagon, the figure will appear as shown in (Fig. 1).

 

   

 

Now, we shall first consider the triangles having only one side AB common with octagon ABCDEFGH and having vertices common with the octagon (See Fig. 2).Such triangles are ABD, ABE, ABF and ABG i.e. 4 in number.

 

 

 

Similarly, the triangles having only one side BC common with the octagon and also having vertices common with the octagon are BCE, BCF, BCG and BCH (as shown in Fig. 3). i.e. There are 4 such triangles.

 

This way, we have 4 triangles for each side of the octagon. Thus, there are 8 x 4 = 32 such triangles.

Q:

A can work twice as fast as B. A and C together can work three times as fast as B. if A,B and C complete a job in 30 days working together, in how many days can each of them complete the work.

 

A) 50,100,120 B) 60,120,120
C) 60,100,80 D) 40,80,100
 
Answer & Explanation Answer: B) 60,120,120

Explanation:
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5 751
Q:

The LCM of the three numbers 45,30 and 35 is:

A) 630 B) 420
C) 180 D) 840
 
Answer & Explanation Answer: A) 630

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2 503
Q:

Select the option that depicts the correct mirror image of the following figure if the mirror is placed at MN.

 

 

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: D) 4

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3 339
Q:

According to the given Venn diagram, the total number of non-athletic and disciplined boys is ___.

 

 

 

A) 1 B) 28
C) 20 D) 10
 
Answer & Explanation Answer: D) 10

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1 4144
Q:

In the following figure, rectangle represents Physicians, circle represents Racers, triangle represents Writers and square represents Mothers. Which set of letters represents Mothers who are not Racers?

 

 

 

A) FGH   B) ECA  
C) DFG   D) DGFI
 
Answer & Explanation Answer: C) DFG  

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3 309
Q:

A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as shown in the given two matrices. The columns and rows of Matrix-I are numbered from 0 to 4 and that of Matrix -II are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, for example 'C' can be represented by 23, 40 etc and 'X' can be represented by 66, 96 etc. Similarly, you have to identify the set for the word 'DUNG'.

 

 

A) 31,76,24,96   B) 20,59,41,88  
C) 33,68,31,75   D) 42,57,75,11
 
Answer & Explanation Answer: D) 42,57,75,11

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0 298
Q:

Select the Answer Figure that will correctly fit in the blank space in the Problem Figure.

 

 

A) A B) B
C) C D) D
 
Answer & Explanation Answer: A) A

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1 1467
Q:

Choose the correct water image of the given problem figure from the answer figures.

 

 

A) A B) B
C) C D) D
 
Answer & Explanation Answer: A) A

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1 1216