11. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
_ a _ b _ abaa _ bab _ abb
_ a _ b _ abaa _ bab _ abb
12. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
abca _ bcaab _ ca _ bbc _ a
abca _ bcaab _ ca _ bbc _ a
13. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
_ tu _ rt _ s _ _ usrtu _
_ tu _ rt _ s _ _ usrtu _
14. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
_ _aba _ _ ba _ ab
_ _aba _ _ ba _ ab
15. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
c _ bbb _ _ abbbb _ abbb _
c _ bbb _ _ abbbb _ abbb _
16. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
_ bbca _ bcca _ ac _ a _ cb
_ bbca _ bcca _ ac _ a _ cb
17. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
a _ bbc _ aab _ cca _ bbcc
a _ bbc _ aab _ cca _ bbcc
18. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
ac _ cab _ baca _ aba _ acac
ac _ cab _ baca _ aba _ acac
19. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
_ aa _ ba _ bb _ ab _ aab
_ aa _ ba _ bb _ ab _ aab
20. Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
c _ bba _ cab _ ac _ ab _ ac
c _ bba _ cab _ ac _ ab _ ac