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 Coding and Decoding Questions

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Q:

If + means x, - means /, x means + and / means -; compute the value of the expression

 

36 - 4 + 7 x 8

 

A) 72 B) 71
C) 74 D) 75
 
Answer & Explanation Answer: B) 71

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Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

18 - 2 ÷ 20 + 5 x 16 = 69

A) ÷ and - B) + and x
C) + and ÷ D) - and +
 
Answer & Explanation Answer: A) ÷ and -

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Q:

If 20 - 10 means 200, 8 / 4 means 12, 6x2 means 4, then

 

100 - 10 x 1000/ 1000 + 100 x 10 = ?

 

A) 20 B) 10
C) 0 D) 1
 
Answer & Explanation Answer: C) 0

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Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

 

16 ÷ 4 - 50 x 4 + 18 = 26

 

A) + and ÷ B) + and x
C) - and + D) ÷ and x
 
Answer & Explanation Answer: B) + and x

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Q:

If MADRAS can be written as NBESBT, how can BOMBAY be written in that code ?

A) CPNCBX B) CPNCBZ
C) CPOCBZ D) CQOCBZ
 
Answer & Explanation Answer: B) CPNCBZ

Explanation:

Each letter in the word is moved one step forward to obtain the corresponding letter of the code.

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Q:

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

16 x 8 - 4 ÷ 9 + 14 = 37

 

A) + and x B) + and ÷
C) ÷ and - D) - and +
 
Answer & Explanation Answer: C) ÷ and -

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Q:

If 70!10 = -7, 70!5 = -14 and 40!4 = -10, then find the value of 20!2 = ?

 

A) 30 B) -10
C) 12 D) -24
 
Answer & Explanation Answer: B) -10

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Q:

If 16#2 = 16, 12#6 = 36 and 6#1 = 3, then find the value of 4#4 = ?

 

A) 2 B) 4
C) 10 D) 8
 
Answer & Explanation Answer: D) 8

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