Coding and Decoding Questions

Q:

Which one of the following interchanges in signs and numbers would make the given equation correct?

 

3 + 5 - 2 = 4

 

A) + and -, 2 and 5 B) + and -, 3 and 4
C) + and -, 2 and 4 D) + and -, 3 and 5
 
Answer & Explanation Answer: D) + and -, 3 and 5

Explanation:
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Q:

If 7*7 = 140, 6*1 = 70 and 3*5 = 80, then find the value of 4*4 = ?

 

A) 60 B) 80
C) 10 D) 40
 
Answer & Explanation Answer: B) 80

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Q:

If E = 5 and READ is coded as 7, then what is the code of 'DEAR' ?

A) 6 B) 7
C) 8 D) 9
 
Answer & Explanation Answer: B) 7

Explanation:

Here E = 5 = 5/1 = 5

=> READ = 18 + 5 + 1 + 4 = 28/4 = 7

=> DEAR = 4 + 5 + 1 + 18 = 28/4 = 7

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Q:

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

 

26 - 2 x 30 ÷ 6 + 16 = 20

 

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

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Q:

If 3!5 = 30, 6!1 = 12 and 5!8 = 80, then find the value of 2!2 = ?

 

A) 28 B) 12
C) 8 D) 32
 
Answer & Explanation Answer: C) 8

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Q:

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

 

7 x 16 + 20 - 20 ÷ 10 = 31

 

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

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Q:

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

 

17 x 6 + 2 - 9 ÷ 2 = 44

 

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

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Q:

If the mathematical operator, '+' means 'x', '/' means '-', '-' means '+', and 'x' means '/', then the value of 11 +14 x7- 5 / 29 is

 

A) -5 B) -12
C) -7 D) -2
 
Answer & Explanation Answer: D) -2

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