The first letter is coded as two letters: the first remains unchanged and the second two letters forward as in English alphabet.

Correct Option: A

The first letter is coded as two letters: the first remains unchanged and the second two letters forward as in English alphabet. The second, fourth, fifth and sixth letters are coded as two letters forward while the third letter is coded as three letters forward as in English alphabet. The last letter remains unchanged.

Coding of letters is based on the structure of the word. Logic of coding is very simple. Observe the word and the codes. It gives us following information:
If the word consists of four letters,
(i) and consonants occupy places at extreme ends only, then those consonants are replaced by [5] while vowels are replaced by either [20] (if both the vowels are same) or [15] (if both the vowels are different).
(ii) and the vowels occupy the second and the fourth places only then those vowels are replaced by [25], while the consonants are replaced by [5].
(iii) and the vowels occupy the first and third places only then those vowels are replaced by [30], while the consonants are replaced by [5].
If the word consists of three letters,
(i) and the vowels occupy places at extreme ends only then those vowels are replaced by [0], while the consonant is replaced by [5].
(ii) and the consonants occupy places at extreme ends only then those consonants are replaced by [5], while the vowel is replaced by [10].
Thus, in each and every case consonants are coded as [5] but numeric value assigned to vowels varies according to the position of vowels in a particular word.

Correct Option: A

Coding of letters is based on the structure of the word. Logic of coding is very simple. Observe the word and the codes. It gives us following information:
If the word consists of four letters,
(i) and consonants occupy places at extreme ends only, then those consonants are replaced by [5] while vowels are replaced by either [20] (if both the vowels are same) or [15] (if both the vowels are different).
(ii) and the vowels occupy the second and the fourth places only then those vowels are replaced by [25], while the consonants are replaced by [5].
(iii) and the vowels occupy the first and third places only then those vowels are replaced by [30], while the consonants are replaced by [5].
If the word consists of three letters,
(i) and the vowels occupy places at extreme ends only then those vowels are replaced by [0], while the consonant is replaced by [5].
(ii) and the consonants occupy places at extreme ends only then those consonants are replaced by [5], while the vowel is replaced by [10].
Thus, in each and every case consonants are coded as [5] but numeric value assigned to vowels varies according to the position of vowels in a particular word.

16 ⇒ (2 + 2)² = 4²
9 ⇒ (3 + 0)² = 3²
∴ 64 ⇒ (4 + 4)² = 8²

Correct Option: A

16 ⇒ (2 + 2)² = 4²
9 ⇒ (3 + 0)² = 3²
∴ 64 ⇒ (4 + 4)² = 8²

we can write the given word COMMUNICATIONS as -
C → 1
O → 2
M → 3
M → 4
U → 5
N → 6
I → 7
C → 8
A → 9
T → 10
I → 11
O → 12
N → 13
S → 14

Correct Option: A

we can write the given word COMMUNICATIONS as -
C → 1
O → 2
M → 3
M → 4
U → 5
N → 6
I → 7
C → 8
A → 9
T → 10
I → 11
O → 12
N → 13
S → 14
After rearrangement , The letter N will be the tenth letter counting from right .

The pattern is given in the question as below.
E → (i)
R → (ii)
D → (iii)
I → (iv)
S → (v)
P → (vi)
Try to form a word by arranging the letters for all given option one by one.

Correct Option: D

The pattern is given in the question as below.
E → (i)
R → (ii)
D → (iii)
I → (iv)
S → (v)
P → (vi)
Try to form a word by arranging the letters for all given option one by one.
Arranging to given word in question ,we get the meaningful word -
S → (v)
P → (vi)
I → (iv)
D → (iii)
E → (i)
R → (ii)
Hence , the required answer will be SPIDER.