Question

13, 10.8, 5.4, 8.2, 17.8, ?
A) 5.8
B) 5.6
C) 6.2
D) 7.2
E). 6.8
.) 4, 19, 64, 139, ?, 379
A) 254
B) 233
C) 236
D) 244 E) 262
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Answer 1

Answer:

5.4 it is right.......ans

Answer 2

series is bit wrong

correct series is

13 10.8 15.4 8.2 17.8 ?

13 + 2.4 = 15.4

10.8 - 2.6 = 8.2

15.4 + 2.4 = 17.8

? is 8.2 - 2.6 = 5.6

option (b) is the answer