Coding and Decoding Questions and Answers

In a certain code 'MISSIONS' is written as 'MSIISNOS'. How is 'ONLINE' written in that code?

1. OLNNIE

2. ONILEN

3. NOILEN

4. LNOENI

5. ONNLIE

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Sol: Option 1
Explanation: First and last letter remain same. The others interchange their positions in pair of two. So, NL become LN IN become NI so code of ONLINE will be OLNNIE
In certain code 'TIGER' is written as 'QDFHS'. How is 'FISH' written in that code?

1. GERH

2. GRHE

3. GREH

4. GHRE

5. GEHR

Sol: Option 2
Explanation: Reverse the word and move each letter –1. Reverse of FISH is HSIF subtract 1 from each letter of HSIF. So code of FISH become GRHE.
In certain code 'FROZEN' is written as 'OFAPSG'. Then how would 'MOLTEN' be written in that code?

1. OFPOMN

2. OFSMPN

3. OFUMPN

4. OFUNPM

5. OFUMON

Sol: Option 3
Explanation: Reverse the word and move each letter +1. Reverse of MOLTEN is NETLOM add 1 to each letter of NETLOM. So code of MOLTEN become OFUMPN.
In a certain code 'ROAR' is written as 'URDU'. How is 'URDU' written in that code?

1. V X D Q

2. XUGX

3. ROAR

4. VSOV

5. V Z C P

Sol: Option 2
Explanation: Each letter moves +3. Add 3 to each letter of URDU,so code of URDU will be XUGX
In a certain code 'LIMCA' is written as 'HJLDZ'. Which of the following words is written as 'IFWJBP'?

1. M E X I C O

2. MERCURY

3. JAPAN

4. MIDNIGHT

5. H O N D U S

Sol: Option 1
Explanation: Each letter moves +1, -1, ....alternately except for L, which is –4. We have to find the word for the code IFWJBP. Add 4 to I then -1, +1 alternately to the remaining letters. The word will be MEXICO.

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In certain code 'HILTON' is written as 'I H T L N O'. How is 'BILLION' written in that code?

1. IBLLION

2. IBOILLN

3. IBLLOIN

4. IBLOILN

5. IBOLLIN

Sol: Option 3
Explanation: Letters are interchanged in each pair. So code of BI become IB, IO become OI. So code BILLION will be IBLLOIN
If in the English alphabet, every alternate letter from B onwards is written in small letters while others are written in capitals, then how will the 3rd day from Tuesday will be coded?

1. W e D N e S d A Y

2. W E d n E S d A Y

3. T H U R S d A Y

4. T h U r S d A Y

5. f r I d A Y

Sol: Option 5
Explanation: The small letters are b, d, f, h, j, l, n, p, r, t, v, x, z. The third day from tuesday will be friday and code will be frIdAY.
If the letters of the word 'CYCLINDER' are arranged alphabetically, then which letter would be farthest from the first letter of word?

1. N

2. E

3. Y

4. R

5. None of these

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Sol: Option 3
Explanation: Last letter is ‘Y’.
In a certain code 'CERTAIN' is coded as 'BFQUZJM'. How is 'MUNDANE' coded in that code?

1. LVMEZOD

2. NTCOMBF

3. NTOCNBF

4. LTMCZOF

5. None of these

Sol: Option 1
Explanation: Each letter moves -1, +1 alternately. So, M - 1 = L, U + 1 = V and so on. So code for MUNDANE will be LVMEZOD
In a certain code 'SEQUENCE' is coded as 'FDOFVRFT. How is 'CHILDREN' coded in that code?

1. OFESJMID

2. OFSEMJID

3. OFSEJIMD

4. OFSEJMID

5. None of these

Sol: Option 2
Explanation: Reverse the word and +1 to each letter. The reverse of CHILDREN is NERDLIHC. add 1 to each letter. Therefore, the code of CHILDREN becomes OFSEMJID.