Question

165, 195, 255, 285, 345, ?
A.390
B.420
C.435
D.375

Answer 1

Answer:

d.375

Step-by-step explanation:

diff bw first two numbers is 30

diff bw 3rd & 2nd number is 60

diff bw 4th & 3rd number is 30

diff bw 5th &4th number is 60

so diff bw 6th & 5th number is 30