Coding and Decoding Questions

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 40@8 = 50, 30@3 = 100 and 10@2 = 50, then find the value of 20@5 = ?

 

A) 70 B) 50
C) 40 D) 90
 
Answer & Explanation Answer: C) 40

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Q:

If in a certain language if ENTRY is coded as 12345 and STEADY is coded as 931785, then state which is the correct code for below word. NEATNESS

A) 25196577 B) 21732199
C) 21362199 D) 21823698
 
Answer & Explanation Answer: B) 21732199

Explanation:

The alphabets are soded as shown :

 

ENTRYSAD1 2  3 4  5  9 7  8

 

N is coded as 2,

 

E as 1,
A as 7,
T as 3   and
S as 9.
So, NEATNESS is coded as 21732199.

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Q:

Select the correct set of symbols which will fit in the given equation?

 

5 0 3 5 = 20

 

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

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Q:

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

 

24 + 4 - 20 ÷ 9 x 5 = 31

 

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

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Q:

If 20&60 = 8, 40&80 = 12 and 10&20 = 3, then find the value of 20&50 = ?

 

A) 18 B) 7
C) 10 D) 17
 
Answer & Explanation Answer: B) 7

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Q:

If 18!10 = 4, 10!4 = 3 and 4!8 = -2, then find the value of 16!18 = ?

 

A) 2   B) -1  
C) -8   D)  9
 
Answer & Explanation Answer: B) -1  

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Q:

Which of the following terms follows the trend of the given list?

 

QPQPQRPQP, QPQPRQPQP, QPQRPQPQP, QPRQPQPQP, QRPQPQPQP, _______________.

 

A) RQPQPQPQP   B) QPQPQPRQP  
C) QPQPQRPQP D) QPQPRQPQP
 
Answer & Explanation Answer: A) RQPQPQPQP  

Explanation:
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