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Question 1 of 22
1. Question
Find the next term of given series.
AC EH IM MR ..?..
Hint
First letter of each term is + 4 letters ahead of the previous term. Similarly second term is + 5 terms ahead of the previous term.

Question 2 of 22
2. Question
Find the next term of given series.
AE, CG, EI, GK, ..?..
Hint

Question 3 of 22
3. Question
Find the next term of given series.
A B A B C B C B C D C D ..?..
Hint
A B A, B C B, C B C, D C D, E D E.

Question 4 of 22
4. Question
Find the next term of given series.
D I L Q T Y B G ..?..
Hint
After D, 4 letters are skipped and I follows after which 2 letters are skipped Trend flows alternatively:
D(EFGH) I (JK) L(MNOP) Q (RS) T(UVWX) Y(ZA) B(CDEF) G(HI) J. 
Question 5 of 22
5. Question
Find the next term of given series.
ABD, DGK, HMS, MTB, SBL, ..?..
Hint
The first letters of the triplets move 3, 4, 5, 6, 7 …. steps forward.
The second letters of the triplets move 5, 6, 7, 8, 9 … steps forward.
The third letters of the triplets move 7, 8, 9, 10 …. steps forward.
Hence, the next triplet of alphabets is ZKW. 
Question 6 of 22
6. Question
Find the next term of given series.
BDF, CFI, DHL, ..?..
Hint
Clearly, the first, second and third letters of each term are respectively moved one, two and three steps forward to obtain the corresponding letters of the next term. So, the next term is EJO.

Question 7 of 22
7. Question
Find the next term of given series.
LXF, MTJ, NPN, OLR, ..?..
Hint
The first letter of each term is moved one step forward, the second letter is moved four steps backward and the third letter is moved four steps forward to obtain the corresponding letters of the next term.

Question 8 of 22
8. Question
Find the next term of given series.
ATTRIBUTION, TTRIBUTIO, RIBUTIO, IBUTI, ..?..
Hint
ATTRIBUTION ⇒ TTRBUTIO
TTRIBUTIO ⇒ RIBUTIO
RIBUTIO ⇒ IBUTI
IBUTI ⇒ UTI 
Question 9 of 22
9. Question
Find the next term of given series.
BE GK MR TZ BI ..?..
Hint
First letters of each group are in the order + 5, + 6, +7 and so on, whereas the last letters of each group are in the order + 6, + 7, + 8 and so on.

Question 10 of 22
10. Question
Find the next term of given series.
ABD, DGK, HMS, MTB, SBL, ..?..
Hint
The first letters of the triplets move 3, 4, 5, 6, 7 …. steps forward.
The second letters of the triplets move 5, 6, 7, 8, 9 … steps forward.
The third letters of the triplets move 7, 8, 9, 10 …. steps forward.
Hence, the next triplet of alphabets is ZKW. 
Question 11 of 22
11. Question
Find the next term of given series.
BDF, CFI, DHL, ..?..
Hint
Clearly, the first, second and third letters of each term are respectively moved one, two and three steps forward to obtain the corresponding letters of the next term. So, the next term is EJO.

Question 12 of 22
12. Question
Find the next term of given series.
LXF, MTJ, NPN, OLR, ..?..
Hint
The first letter of each term is moved one step forward, the second letter is moved four steps backward and the third letter is moved four steps forward to obtain the corresponding letters of the next term.

Question 13 of 22
13. Question
Find the next term of given series.
C4X, F9U, I16R, ..?..
Hint
C is the 3rd letter, F sixth, I ninth so next letter will be 12th, i.e. L.
The middle numerics are the squares of 2, 3, 4 and so on. So next numeric would be 25.
The last letter follow the order : U is 3rd letter after R, X is 3rd after U. So, R would be 3rd letter after ‘O’.
∴ Missing term = L25O. 
Question 14 of 22
14. Question
Find the next term of given series.
3F, 6G, 11I, 18L, ..?..
Hint
The letters in the first, second, third and fourth terms are respectively moved one, two, three and four steps forward to obtain the letter in the subsequent terms. the sequence followed by the numbers is +3, +5, +7, +9.

Question 15 of 22
15. Question
Find the next term of given series.
C4X, F9U, I16R, ..?..
Hint
C is the 3rd letter, F sixth, I ninth so next letter will be 12th, i.e. L.
The middle numerics are the squares of 2, 3, 4 and so on. So next numeric would be 25.
The last letter follow the order : U is 3rd letter after R, X is 3rd after U. So, R would be 3rd letter after ‘O’.
∴ Missing term = L25O. 
Question 16 of 22
16. Question
Find the next term of given series.
cx fu ir ..?.. ol ri
Hint
The first letter of each term is moved three steps forward and the second letter is moved three steps backward to obtain the corresponding letters of the next term.

Question 17 of 22
17. Question
Find the missing term in the following series.
BC FG JK ..?.. RS VW
Hint

Question 18 of 22
18. Question
Find the missing term in the following series.
AZB, CYD, EXF, ..?.., IVJ, KUL
Hint
Observe the first letter of each group. These letters are alternate letters starting from A. Hence, the first letter of the missing group will be G. Similarly, observe second and third letters of each group. Hence, the required group is GWH.

Question 19 of 22
19. Question
Find the missing term in the following series.
SEQUENTIAL EQUENTIAL EQUENTI ..?.. QUEN
Hint
SEQUENTIAL, (S)EQUENTIAL, EQUENTI(A)(L), (E)QUENTI QUEN(T)(I)
In the given sequence one letter and two letters are lost alternately. 
Question 20 of 22
20. Question
Find the missing term in the following series.
J2Z, K4X, I7V, ..?.., H16R, M22P
Hint
The first letters in odd numbered terms form series J, I, H and in even numbered terms form the series K, L, M. The sequence followed by the numbers is + 2, + 3, + 4, + 5, + 6. The third letter of each term is moved two steps backward to obtain the third letter of the next term.

Question 21 of 22
21. Question
Find the missing term in the following series.
J2Z, K4X, I7V, ..?.., H16R, M22P
Hint
The first letters in odd numbered terms form series J, I, H and in even numbered terms form the series K, L, M. The sequence followed by the numbers is + 2, + 3, + 4, + 5, + 6. The third letter of each term is moved two steps backward to obtain the third letter of the next term.

Question 22 of 22
22. Question
Find the wrong term in the letternumber series given below :
G4T, J10R, M20P, P43N, S90L
Hint
The first letter of each term is moved three steps forward and the last letter is moved two steps backward to obtain the corresponding letters of the next term. The numbers follow the sequence:
× 2 + 1, × 2 + 2, × 2 + 3, × 2 + 4.
So, 10 is wrong and must be replaced by:
(4 × 2 + 1) i.e. 9.