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Question

In a certain code, ZEBRA is written as ZQADY. How will HINTS be written as in that code?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
HUMFQ

Decoding ZEBRA to ZQADY Pattern

To find the code for HINTS, first analyze the pattern used to encode ZEBRA as ZQADY. We compare the letter positions in the alphabet (A=1, B=2, ..., Z=26).

  • Z (26) becomes Z (26): The shift is $26 - 26 = 0$.
  • E (5) becomes Q (17): The shift is $17 - 5 = +12$.
  • B (2) becomes A (1): The shift is $1 - 2 = -1$.
  • R (18) becomes D (4): The shift is $4 - 18 = -14$.
  • A (1) becomes Y (25): The shift is $25 - 1 = +24$, which modulo 26 is $-2$ (i.e., $1 - 2 = -1 \equiv 25 \pmod{26}$). The shift is $-2$.

The sequence of shifts applied is: +0, +12, -1, -14, -2.

Applying Code Pattern to HINTS

Now, apply this sequence of shifts (+0, +12, -1, -14, -2) to the letters of HINTS:

  • H (8th letter): Apply +0 shift. $8 + 0 = 8$. The 8th letter is H.
  • I (9th letter): Apply +12 shift. $9 + 12 = 21$. The 21st letter is U.
  • N (14th letter): Apply -1 shift. $14 - 1 = 13$. The 13th letter is M.
  • T (20th letter): Apply -14 shift. $20 - 14 = 6$. The 6th letter is F.
  • S (19th letter): Apply -2 shift. $19 - 2 = 17$. The 17th letter is Q.

Final Coded Word

Combining the resulting letters (H, U, M, F, Q) gives the coded word HUMFQ.

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  2. There are two rows, each containing 3 numbers. Below are some rules to be used to get the resultant number for each row separately. Use the rule from left to right for each row and find the answer to the question.

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    Row I: 9,11, 34

    Row II: 16, 9, 8

    What is the difference between the resultant numbers in the first row and the second row

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