CODING & DECODING (General Mental Ability) UPSC EPFO

Total Questions: 31

1. If EODGH is the code for BLADE, what is the code for CRICKET?

Correct Answer: (b) FULFNHW
Solution:

2. If EARTH is coded as 41590 and PALE as 2134, what is the code for PEARL?

Correct Answer: (d) 24153
Solution:Codes for letters are: P=2, E=4, A=1, R=5 and L=3 Hence, code of PEARL is 24153

3. In a secret way of writing 'GANDHI WAS A GREAT LEADER OF INDIA' is written as 'RUFZOJ SUV U RDTUB QTUZTD EP JFZJU'. Keeping this in mind, pick the code for each word given below from the choices given:

STRONG

Correct Answer: (d) VBDEFR
Solution:

4. In a given code SISTER is coded as 535301. UNCLE as 84670 and BOY as 129. How is RUSTIC written in that code?

Correct Answer: (b) 185336
Solution:

In this code the alphabets are coded as follows
S I S T E R     U N C L E     B O Y
5 3 5 3 0 1    8 4 6 7 0      1 2 9
If we apply this method, the code comes out to be185336

5. If 'word' is coded as 2315184 then how will 'simple' be coded as?

Correct Answer: (b) 1991316125
Solution:

Here we observe that ‘W’ has been replaced by its position code that is by 23. Similarly ‘O’ has been replaced by 15 therefore the word ‘SIMPLE’ will be coded as
S - 19, I - 9, M - 13, P - 16, L - 12, E - 5
Hence required will be code 1991316125

6. If wall is called window, window is called door, door is called floor, floor is called roof and roof is called ventilator, what will a person stand on?

Correct Answer: (c) Roof
Solution:

A person stands on the floor and in the given code language, floor is called roof.
Hence, roof will be the correct answer.

7. In a certain code language ‘La Ke Ta’ means ‘go and swim’, ‘Ne La Se’ means ‘you swim here’ and ‘Pe Ke Ne Ta’ means ‘he and you go’. Which of the following is the code for ‘here’ in that code language ?

Correct Answer: (d) None of these
Solution:

8. If 'spoon' is called 'plate 'plate' is called 'knife', 'knife' is called 'jug', 'jug' is called 'glass', 'glass' is called 'saucer' and 'saucer' is called 'spoon', by what do we cut fruit?

Correct Answer: (b) jug
Solution:We cut fruit with knife and knife is called jug, hence correct answer is jug.

9. If 'A' is substituted by 26, 'B' by 25 and so on upto 'Z' which is substituted by 1, what will be the sum of the numbers substituted for the word 'WAXY'?

Correct Answer: (b) 35
Solution:

10. If E is coded as V, D is coded as Q, N is coded as Z, G is coded as T, R is coded as I and A is coded as M, which of the following will be the correct form of the word DANGER?

Correct Answer: (b) QMZTVI
Solution: