Number Series-Test 4 (Finding the next term)

16)

What will come in place of question mark (?) in the following number series?

6, 26, 134, 66, 3334, 16666, ?

[United Bank of India, 2008]
Discussion
17)

30, 35, 65, 100, 165, 265, ?

[Dena Bank (PO), 2008]
Discussion
18)

3, 5, 7, ?, 13

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[Dena Bank (PO), 2008]
Discussion
19)

16, 17, 15, 18, 14, ?

[Dena Bank (PO), 2008]
Discussion
20)

2, 3, 6, 18, 108, ?

[Dena Bank (PO), 2008]
Discussion

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