how i can do rearrangement in English?

I suggest u to watch the video available on mahendra guru u tube channel (SBI CLERK 2018) re arrangement series

30, 30, 42, 60, 140, ? sloveeee

GIven sequence, 30, 30, 42, 60, 140, ? Difference between the first 2 numbers is 1^3 - 1^2 = 0 Difference between the next 2 numbers is 2^3 + 2^2 = 12 Difference between the next 2 numbers is 3^3 - 3^2 = 18 Difference between the next 2 numbers is 4^3 + 4^2 = 80 Difference between the next 2 numbers is 5^3 - 5^2 = 100 So, 140 + 100 =240