Question

90,70,50,30,10 then what number

Answer 1

next number will be => -10

as it has difference of 20...

10-20=-10

Answer 2

the succeeding no. of the ap, if the ap is reversed, would be
110
since
a=10
d=20
a6= 10+(6-1)*20
= 10+5*20
=10+100
= 110