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Letters Series Test Questions
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Letter Series type of questions usually consists of a series of small letters which follow a specific pattern. 

Letters Series Test Questions
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20 Questions

1. ABC, ACE, ADG, ?
2. ADG, XVT, BEH, WUS, ?
3. AZ, GT, MN, ?
, YB
4. AEI, BFJ, CGK, ?
5. CFI, IKM, OPQ, ?
6. ABC, EFG, HIJ, ?
7. DED, EFE, FGF, ?
8. KNQ, TWZ, CFI, ?
9. IOU, JKL, PQR, ?
10. LAZ, NEX, PIV, ?
11. BMY, DNW, FOU, ?
12. GMSY, IOUA, KQWC, ?
13. KNQ, TWZ, CFI, ?
14. JOBS, KMEO, LKHK, ?
, NGNC
15. ADG, GJM, ?
, SVY
16. VCL, UEI, TGF, ?
17. AZ, CX, EV, ?
18. PQR, HIJ, DEF, ?
19. XYZ, UVW, ?
, OPQ
20. ADG, GJM, MPS, ?