Question

IF TEACHER IS coded as 129 then STUDENT may be coded as

Answer 1

When we convert English Alphabets into numbers.
As, English Alphabets contain 26 letters, we start counting from the last.

A= 26, B = 25, C = 24 and so on
Then the code will be as
T= 7
E=22
A= 26
C= 24
H=19
E=22
R=9

Adding All, TEACHER = 7+22+26+24+19+22+9 = 129

Similarly, 
S= 8
T=7
U=6
D=23
E=22
N=13
T= 7 

Adding All together,

STUDENT = 8+7+6+23+22+13+7 = 86

Answer 2

Answer:

if you started counting from z to a you will get the answer