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 Coding and Decoding Questions

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Q:

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

 

32 ÷ 16 - 5 x 8 + 2 = 13

 

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

Explanation:
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Q:

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

 

14 + 18 x 40 - 10 ÷ 20 = 66

 

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

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Q:

If 6α1 = 70, 2α3 = 50 and 4α5 = 90, then find the value of 1α4 = ?

 

A) 50   B) 30  
C) 10   D) 60
 
Answer & Explanation Answer: A) 50  

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Q:

If 1!9 = -80, 2!8 = -60 and 8!1 = 70, then find the value of 3!2 = ?

 

A) -20   B) -120  
C) 100   D) 10
 
Answer & Explanation Answer: D) 10

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Q:

In a certain code language STUDENT is written as TUTDNES.How will SOURCES be writte in that code language?

A) SOURCES B) SUORECS
C) SRUOCES D) SOURSEC
 
Answer & Explanation Answer: B) SUORECS

Explanation:

- There are 7 letters in the word

- The middle letter has been left intact

- The first and the last letters  of the word have interchanged their position. Similarly, the second and the third letters and the fifth and sixth letters have interchanged their position.

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Q:

If - means /, / means +, x means - and + means x, then determine the value of

 

35 - 7 x 14 / 28

A) 19 B) 24
C) 15 D) 20
 
Answer & Explanation Answer: A) 19

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Q:

Which signs should be interchanged if the equation below needs to be true?

 

1.5 + 8 x 9 - 16 / 2 = 4

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

Explanation:
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Q:

Select the correct set of symbols

 

27  3   19   10  =  90

 

A) x, - , / B) +, /, -
C) +, -, / D) x, +, -
 
Answer & Explanation Answer: D) x, +, -

Explanation:
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