In a certain code language, ‘BACK’ is coded as ‘2325215’, ‘CAME’ is coded as ‘2125117’. What is the code for ‘GBJH’ in that code language?

1323711

1   2    3    4   5    6   7     8    9  10  11  12  13

 A   B   C    D   E    F   G    H    I    J    K    L   M

 ↓    ↓    ↓    ↓    ↓     ↓   ↓    ↓     ↓   ↓    ↓    ↓    ↓

 Z   Y    X   W   V    U   T    S    R   Q   P    O   N

26  25  24  23  22  21  20  19  18  17  16  15  14

**********************************************************

The logic is;

(place value of opposite letter - positional value of given letter)

So,

B → Y(25) - 2= 23

A → Z(26) - 1= 25

C → X(24) - 3= 21

K → P(16) - 11= 5

Similarly,

G → T(20) - 7= 13

B → Y(25) - 2= 23

J → Q(17) - 10= 7

H → S(19) - 8= 11

Thus, 1323711 is correct.