Olympiad Test: Coding Decoding - 1


10 Questions MCQ Test Mathematics Olympiad Class 7 | Olympiad Test: Coding Decoding - 1


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Attempt Olympiad Test: Coding Decoding - 1 | 10 questions in 20 minutes | Mock test for Class 7 preparation | Free important questions MCQ to study Mathematics Olympiad Class 7 for Class 7 Exam | Download free PDF with solutions
QUESTION: 1

In a certain language, SIGHT is written as FVTUC, how is REVEAL written in the same language?

Solution:

Each letter in the word is moved thirteen steps forward to obtain the corresponding letter of the code.

QUESTION: 2

If in a certain language, MADRAS is coded as NBESBT, how is BOMBAY coded in that language?

Solution:

Each letter in the word is moved one step forward to obtain the corresponding letter of the code.

QUESTION: 3

In a certain code, ROAD is written URDG, how is SWAN written in that code?

Solution:

Each letter in the word is moved three steps forward to obtain the corresponding letter of the code.

QUESTION: 4

In a certain code, FAVOUR is written as EBUPTS, how is DRAGON written in that code?

Solution:

The first, third and fifth letters are each moved one step backward, while the second, fourth and sixth letters are each moved one step forward to obtain the corresponding letters of the code.
Therefore, D will become C
A will become B
N will become M
G will become H
E will become D
R will become S

DANGER ⇒ CBMHDS

QUESTION: 5

If DELHI can be coded as CCIDD, how would you code KOLKATA?

Solution:

The first, second, third, fourth, …… letters of the word are moved one, two, three, four, steps backward respectively to obtain the corresponding letters of the code.

QUESTION: 6

If POND is coded as RSTL, how is DEAR written in that code?

Solution:

The first, second, third and fourth letters of the word are moved two, four, six, and eight letters forward respectively to obtain the code.

QUESTION: 7

In a certain code, KAVERI is written as VAKIRE, how is MYSORE written in that code?

Solution:

MYSORE ⟶ MYS/ORE ⟶ 
SYM/ERO ⟶ SYMERO.

QUESTION: 8

In a certain code, CALANDER is written as CLANAEDR. How is CIRCULAR written in that code?

Solution:

The second and third letters, fourth and fifth letters, sixth and seventh letters of the word mutually interchange positions to form the code.

QUESTION: 9

If a certain code, CONDEMN is written as CNODMEN. How will TEACHER be written in that code?

Solution:

The last letter of the word remains unaltered in the code. The first six letters of the word are divided into two groups of three letters each and then, in each group, of three letters each and then, in each group, the last two letters are written in a reverse order.

QUESTION: 10

In a certain code language, HAND is written as SZMW then what will be the code of MILK?

Solution:

If in the word, a letter is the nth letter from the beginning of the English alphabet then in the code the corresponding letter is the nth letter from end.

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