220
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:

Select the option in which Figure-X is embedded. (Rotation is not allowed)

 

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

Explanation:
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0 1392
Q:

Select the option figure in which the given figure is embedded (rotation is NOT allowed).

 

 

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

Explanation:
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4 3340
Q:

Which of the following cube in the answer figure cannot be made based on the unfolded cube in the question figure?

 

 

 

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

Explanation:
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8 1597
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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9 2457
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

Explanation:
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4 1852
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

Explanation:
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5 1575
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

Explanation:
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3 6873
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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4 1863