IAS
CODEX
U
P
S
C
C
S
E
2
0
2
6
U
P
S
C
C
S
E
2
0
2
6
F
e
a
t
u
r
e
s
F
e
a
t
u
r
e
s
P
Y
Q
P
o
r
t
a
l
P
Y
Q
P
o
r
t
a
l
R
e
s
o
u
r
c
e
s
R
e
s
o
u
r
c
e
s
checking user
checking user
checking user
checking user
Q. 51
Discuss
Attempt
Questions
Prev
Next
Hide Kepler Chat
CSAT • 2019 • CSAT
What is X in the sequence
4, 196, 16, 144, 36, 100, 64, X ?
A
48
B
64
C
125
D
256
Kepler. Discussing PYQs. Q.no. 51