Complete the series: B, D, F, H, ?

A. J

If the pattern is 1, 2, 4, ?, 16, 32, what number should replace the question mark?

A. 8

In the series X, Y, ?, A, B, what character should fill the gap?

A. Z

In a certain language, 'SCHOOL' is coded as 'TIDPMM'. What is the code for 'COLLEGE'?

D. DPMLHE

Which group of numbers does not belong?

A. 8, 10