Fill in the blank space for the given series with the correct alternative.
$563, 647, 479, 815, (...)$

Fill in the blank space for the given series with the correct alternative.
$2, 5, 9, (\ldots), 20, 27$

Choose the correct alternative to complete the series: $ccb....c....bbc.....b....cc.....ccbb$

Which is the number that comes next in the sequence:
$0, 6, 24, 60, 120, 210, ?$

Study the following arrangement carefully and answer the question.
$O, 4, E, J, 5, T, 1, A, M, Q, 3, 8, N, I, K, 7, W, F, 6, S, 9, U, 2, Y, X$
How many such numbers are there in the above arrangement,each of which is immediately preceded by a consonant and also immediately followed by a consonant?

Choose the correct alternative to complete the series: $b . . b . . b b . . . b b b . . . . b b . . b$