Aptitude Questions on Alpha Numeric Series
Q. 1 A curious pattern of letters and numbers emerges in the following series. Identify the missing term?
A1, C4, F9, J16, ?
A. O25
B. M25
C. N25
D. P25
Check Solution
Ans: D. P25
The alphabetical sequence progresses as A, C, F, J, …
A (+2) → C (+3) → F (+4) → J (+5).
The numerical sequence is 1, 4, 9, 16 (perfect squares of consecutive integers).
Next alphabet: J (+6) = P.
Next square: $16 + 2^2 = 25$
Q. 2 A coded sequence of letters and numbers unfolds below. Find the next term in the series:
2B, 4D, 8G, 16K, ?
A. 32M
B. 32P
C. 32O
D. 32N
Check Solution
Ans: B. 32P
The numbers double each time: 2,4,8,16,32
The letters follow the pattern B (+2) → D (+3) → G (+4) → K (+5).
Next letter: K (+5) = P.
Q. 3 Observe the following combination of letters and numbers. What comes next in the sequence?
A3C, B5E, D9G, G17I, ?
A. K25K
B. K33K
C. J33K
D. J25L
Check Solution
Ans: B. K33K
Letter sequence: A (+1) → B (+2) → D (+3) → G (+4). Next: G (+5) = K.
Number sequence: 3,5,9,17 (doubling the difference: +2,+4,+8 ). Next: 17+16=33
Last letter sequence: C (+2) → E (+2) → G (+2) → I (+2). Next: I (+2) = K.
Q. 4 Which term completes the series?
Z10, Y20, X30, W40, ?
A. U50
B. V50
C. V60
D. U60
Check Solution
Ans: B. V50
Letter sequence: Z (-1) → Y (-1) → X (-1) → W (-1). Next: W (-1) = V.
Number sequence: 10,20,30,40 (increasing by 10). Next: 40+10=50
Q. 5 A unique sequence of letters and numbers is presented. Find the missing term:
3X, 7V, 13T, 21R, ?
A. 27P
B. 31P
C. 31Q
D. 31N
Check Solution
Ans: B. 31P
Number sequence: 3,7,13,21 (differences are +4,+6,+8). Next: 21+10=31
Letter sequence: X (-2) → V (-2) → T (-2) → R (-2). Next: R (-2) = P.
Q. 6 What comes next in the series?
M12, N14, P18, S24, ?
A. X32
B. T30
C. W36
D. U34
Check Solution
Ans: A. X32
Letter sequence: M (+1) → N (+2) → P (+3) → S (+4). Next: S (+5) = X.
Number sequence: 12,14,18,24 (differences are +2,+4,+6). Next: 24+8=32
Q. 7 A combination of letters and numbers appears in this sequence. Identify the next term:
A1B, C4E, F9H, J16K, ?
A. O25N
B. P25N
C. O25M
D. P25M
Check Solution
Ans: B. P25N
Letter sequence 1: A (+2) → C (+3) → F (+4) → J (+5). Next: J (+6) = P.
Number sequence: 1,4,9,16 (perfect squares). Next: $16 + 2^2 = 25$
Letter sequence 2: B (+3) → E (+3) → H (+3) → K (+3). Next: K (+3) = N.
Q. 8 Which term completes this pattern?
2C, 6F, 12J, 20O, ?
A. 30T
B. 30U
C. 32S
D. 30S
Check Solution
Ans: B. 30U
Number sequence: 2,6,12,20 (differences are +4,+6,+8). Next: 20+10=30
Letter sequence: C (+3) → F (+4) → J (+5) → O (+6). Next: O (+7) = U.
Q. 9 A unique sequence of letters and numbers is presented. Find the missing term:
A2Z, C6X, F12V, J20T, ?
A. O30R
B. O30S
C. P30R
D. P32S
Check Solution
Ans: C. P30R
Letter sequence 1: A (+2) → C (+3) → F (+4) → J (+5). Next: J (+6) = P.
Number sequence: 2,6,12,20 (differences +4,+6,+8). Next: 20+10=30
Letter sequence 2: Z (-2) → X (-2) → V (-2) → T (-2). Next: T (-2) = R.
Q. 10 Which term fits the series?
1A, 4C, 9F, 16J, ?
A. 25N
B. 25M
C. 26N
D. 24M
Check Solution
Ans: B) 50 km/hr.
Number sequence: 1,4,9,16 (perfect squares). Next: $16 + 2^2 = 25$
Letter sequence: A (+2) → C (+3) → F (+4) → J (+5). Next: J (+6) = P.
Refer Topic wise Aptitude Questions with Solutions
Refer Questions for next topic: https://www.learntheta.com/aptitude-questions-blood-relations/