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Q:

The size of the wooden block is 5 x 10 x 20 cm .How many such blocks will be required to construct a solid wooden cube of minimum size? 

A) 6 B) 8
C) 12 D) 16
 
Answer & Explanation Answer: B) 8

Explanation:

Side of smallest cube = L.C.M of 5, 10, 20 = 20cm  

Volume of the cube = (20 x 20 x 20)cu.cm = 8000 cu.cm  

Volume of the block= (5 x 10 x 20)cu.cm = 1000 cu.cm  

Number of blocks = (8000/1000) = 8

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams
Job Role: Bank PO

Q:

What is seismic zone extending at an angle of about 45 degrees from the base of an ocean trench, down through lithosphere to the asthenosphere known as

A) Appleton layer B) Benioff zone
C) Conard discontinuity D) Convergence zone
 
Answer & Explanation Answer: B) Benioff zone

Explanation:
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Filed Under: World Geography

Q:

Which one of the following actors was awarded the Dada Saheb Phalke Award at the 59th National Film Festival

A) Soumitra Chatterjee B) Ketan Mehta
C) Shekhar Kapoor D) Mahesh Bhatt
 
Answer & Explanation Answer: A) Soumitra Chatterjee

Explanation:
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Filed Under: Honours and Awards

Q:

' Global 500 ' awards are given for the outstanding achievement in which of the following fields

A) Population Control B) campaign against drugs
C) Elimination of illiteracy D) Protection of environment
 
Answer & Explanation Answer: D) Protection of environment

Explanation:
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Filed Under: Honours and Awards

Q:

This Union Territory possesses a coastal stretch of about 45 km with 28 marine fishing villages. However 45% of the population is engaged in agricultural and allied products.
Which among the following Union Territories is referred to in the above passage

A) Lakshadweep B) Pondicherry
C) Andaman and Nicobar D) Daman
 
Answer & Explanation Answer: A) Lakshadweep

Explanation:
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Filed Under: Indian Geography

Q:

According to the National Agricultural Aviation Society (NAAS), without the use of crop protection products to control insects, weeds, and diseases, crop yields per acre will drop by more than 50 percent. The first aerial appligreion of insecticide occurred in 1921, and it was a huge success. By contrast, in today's economy all aircraft that are classified as aerial appligreors do more than just apply insecticide; today, they also spread seed and apply fertilizer. 

 

From the information given above it CANNOT be validly concluded that

 

A) In today's economy, if an aerial appligreor is used, then it will be able to spread seed and to apply fertilizer B) according to the NAAS, if crop yields per acre never drop by more than 50 percent, then crop protection products have been used to control insects, weeds, and diseases
C) in today's economy, any aircraft that cannot be used to apply fertilizer cannot be classified as an aerial appligreor D) according to the NAAS, if crop yields per acre drop by more than 50 percent, then crop protection products have not been used to control insects, weeds, and diseases.
 
Answer & Explanation Answer: D) according to the NAAS, if crop yields per acre drop by more than 50 percent, then crop protection products have not been used to control insects, weeds, and diseases.

Explanation:
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Filed Under: Deriving Conclusions From Passages
Exam Prep: GRE

Q:

 (3x + 2) (2x - 5) = ax² + kx + n .

What is the value of a - n + k ?

A) 5 B) 8
C) 9 D) 10
 
Answer & Explanation Answer: A) 5

Explanation:

This is a quadratic equation. To find n we multiply the last terms in each bracket together (2 times -5) = -10

To find ‘a’ we multiply the first terms in each bracket together (3x times 2x) = 6x2, So a = 6.

Thus a - n = 16

To find k we multiply the first term in the first bracket by the second term in the second bracket and add the result to the product of the second term in the first bracket and the first term in the second. (-15x + 4x) = -11x. So k = -11

16 - 11 = 5

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Filed Under: Problems on Numbers
Exam Prep: GRE

Q:

The first term in a sequence is 1 and the second term is 5. From the third term on each term is the average (arithmetic mean) of all preceding terms. What is the 25th term in the sequence?

A) 2.5 B) 3
C) 5 D) 2.5
 
Answer & Explanation Answer: B) 3

Explanation:

Start constructing the sequence until you see the pattern

1...5...(average of 1 and 5 = 3)...(average of 1, 5, and 3 = 3)...(average of 1,5,3 and 3 = 3)

now you can see that all subsequent terms will be 3

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Filed Under: Sequential Output Tracing
Exam Prep: GRE