All MCQs

B=2, A=1, and D=4.
The total is 2 + 1 + 4 = 7.

C=3, A=1, and B=2.
Their sum is 3 + 1 + 2 = 6.

The code uses reverse alphabet positions: D=23, O=12, and G=20.
Therefore, DOG is 23-12-20.

PLANE becomes P-A-L-E-N after swapping L with A and N with E in the stated positions.
Thus, the code is PALEN.

The word is written in reverse order.
Reversing SCHOOL gives LOOHCS.

TEAM read from right to left is MAET.
The code therefore reverses the letter order.

Each letter moves one position forward, with Z wrapping to A.
Y→Z, A→B, and K→L.

Each letter advances by three alphabet positions.
M→P, I→L, L→O, and K→N.

The code gives ordinary alphabet positions.
M=13, A=1, and P=16.

The code uses each letter's alphabet position.
C=3, A=1, and B=2.

Each letter is replaced by the preceding alphabet letter.
L→K, I→H, O→N, and N→M.

The coding rule advances each letter by one position.
M→N, O→P, O→P, and N→O.