Choose the missing terms out of the given alternatives : b e d f ? h j ? l

Choose the missing terms out of the given alternatives.<br> Z, Y, X, U, T, S, P, O, N, K, ?, ?

One term in the number series is wrong. Find out the wrong term.<br> 2, 5, 10, 17, 26, 37, 50, 64

One term in the number series is wrong. Find out the wrong term.<br> 380, 188, 92, 48, 20, 8, 2

One term in the number series is wrong. Find out the wrong term.<br> 2, 5, 10, 50, 500, 5000

One term in the number series is wrong. Find out the wrong term.<br>0, 2, 3, 5, 8, 10, 15, 18, 24, 26, 35

2, 1, 2, 4, 4, 5, 6, 7, 8, 8, 10, 11, ?

6, 17, 39, 72, ?

In the series 2, 6, 18, 54, ...... what will be the 8th term ?