Number Series-Test 2 (Finding the next term)

21)

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

8, 11, 17, ?, 65, 165.5, 498.5

[Indian Bank, 2010]
Discussion
22)

13, 16, 22, 33, 51, (?)

[Bank of Baroda, 2010]
Discussion
23)

39, 52, 78, 117, 169, (?)

[Bank of Baroda, 2010]
Discussion
24)

656, 432, 320, 264, 236, (?)

[Bank of Baroda, 2010]
Discussion
25)

62, 87, 187, 412, 812, (?)

[Bank of Baroda, 2010]
Discussion

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