Test: Coding & Decoding - 1 - Class 10 MCQ

• There are 8 letters in the word.
• The coded word can be obtained by taking the immediately following letters of word, expect the first and the last letters of the given word but in the reverse order.
• That means, in the coded form the first and the last letters have been interchanged while the remaining letters are coded by taking their immediate next letters in the reverse order.

In the given code, A = 2, B = 4, C = 6,.... , Z = 52.

So, ACT = 2 + 6 + 40 = 48 and

BAT = 4 + 2 + 40 = 46

The alphabets are coded as shown:

So, in SEARCH,

S ia coded as 2,
E as 1,
A as 4,
R as 6,
C as 7,
H as 3.
Thus, the code for SEARCH is 214673

The first, second, third, fourth, fifth and sixth letters of th word are respectively moved two, three, four, five, six and seven steps forward to obtain the corresponding letters of the code.

The letter of the word are written in a reverse order and then each letter is moved one step backward to obtain the code.

In the first and second statements, the common word is 'is' and the common code digit is '2'.
So, '2' means 'is'.
In the first and third statements, the common word is 'bright' and the common code digit is '4'.
So, ''4' means 'bright'.
Thus, in the first statement, '3' means 'Light'.
Hence the answer is (a).

The colour of clear sky is 'blue' and as given, 'blue' is called 'sky'.

So, the colour of clear sky is 'sky'.

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

Here HAT is coded as jcv

=> Leaving a letter in between i.e, after H leave i write j in small letters

In the same way, A => c, T => v

Similarly for GUN => iwp