DRDO Multi tasking staff Model paper 4

If we give number to each letter according to its alphabetical order we find that,

Alphabets	A	B	C	D	E	F	G	H	I	J	K	L	M
Positional value	1	2	3	4	5	6	7	8	9	10	11	12	13
Positional value	26	25	24	23	22	21	20	19	18	17	16	15	14
Alphabets	Z	Y	X	W	V	U	T	S	R	Q	P	O	N

Z - T = F i.e.26 – 20 = 6 (the positional value of F)
Z - O = K i.e.26 – 15 = 11(the positional value of K)
Z - K = O i.e.26 – 11 = 15 (the positional value of O)
Z - I ≠ Ni.e.26 – 9 = 17 ≠ 14 (the positional value of N)
Therefore, ZIN is the different one.