Alpha Numeric Series: Reasoning Questions with Answers!
Q. 1 A curious pattern of letters and numbers emerges in the following series. Identify the missing term?
A1, C4, F9, J16, ?
Check Solution
Ans: A) O25
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 (+5) = O.
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, ?
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, ?
Check Solution
Ans: D) 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, ?
Check Solution
Ans: C) 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, ?
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, N24, P18, S24, ?
Check Solution
Ans: C. W30
Letter sequence: M (+1) → N (+2) → P (+3) → S (+4). Next: S (+5) = W.
Number sequence: 12,14,18,24 (differences are +2,+4,+6). Next: 24+8=30
Q. 7 A combination of letters and numbers appears in this sequence. Identify the next term:
A1B, C4E, F9H, J16K, ?
Check Solution
Ans: B. O25N
Letter sequence 1: A (+2) → C (+2) → F (+2) → J (+2). Next: J (+6) = M.
Number sequence: 1,4,9,16 (perfect squares). Next square is 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, ?
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, ?
Check Solution
Ans: C. O30R
Letter sequence 1: A (+2) → C (+3) → F (+4) → J (+5). Next: J (+6) = O.
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, ?
Check Solution
Ans: D) 25O.
Number sequence: 1,4,9,16 (perfect squares). Next: 5^2 = 25$
Letter sequence: A (+2) → C (+3) → F (+4) → J (+5). Next: J (+6) = O.
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Q. 11 Find the next term: KN, KO, KP, KQ, ?
Check Solution
Ans: A
Please observe the first character: Same alphabet is repeating
Second character: Alphabet is changing in one direction
Q. 12 Find the 5th term: JKO, JJQ, JIS, JHU, ?
Check Solution
Ans: A
Please observe the first character: Same alphabet is repeating
Second character: Alphabet is shifting by 1 place
Third character: Alphabet is increasing by 2 places
Q. 13 Find the next term: KBM, JDN, IFP, HHS, ?
Check Solution
Ans: A
Please observe the first character: Alphabet is changing in one direction
Second character: Alphabet is shifting by 2 places
Third character: Alphabet is increasing sequentially with differences of 1, 2, 3, etc.
Q. 14 Can you guess the following term: DCLA, FDMB, HEOC, JFRA, ?
Check Solution
Ans: A
Please observe the first character: Alphabet is shifting by 2 places
Second character: Alphabet is changing in one direction
Third character: Alphabet is increasing sequentially with differences of 1, 2, 3, etc.Fourth character: Alphabet A, B and C are repeating in a cycle
Q. 15 Find out the next term: LAAB, NBEA, PCID, RAOC, ?
Check Solution
Ans: A
Please observe the first character: Alphabet is shifting by 2 places
Second character: Alphabet A, B and C are repeating in a cycle
Third character: Series of vowelsFourth character: Alphabet positions have been swapped at every alternate step
Q. 16 Find the 5th term: PIN1, PjP2, PKR3, PlT4, ?
Check Solution
Ans: A
Please observe the first character: Same alphabet is repeating
Second character: Alternating upper and lower case letters
Third character: Alphabet is shifting by 2 placesFourth character: Number series in single direction
Q. 17 Find the 5th term: FABA, gECB, HIDE, iOFF, ?
Check Solution
Ans: A
Please observe the first character: Alternating upper and lower case letters
Second character: Series of vowels
Third character: Series of consonantsFourth character: Alternating series of vowels and consonants, each vowel being followed by next consonant and each consonant being followed by next vowel in alphabetical order: ABEFIJOPUV
Q. 18 Find the 5th term: EBB1, FAC5, HDD4, KCF8, ?
Check Solution
Ans: A
Please observe the first character: Alphabet is increasing sequentially with differences of 1, 2, 3, etc.
Second character: Alphabet positions have been swapped at every alternate step
Third character: Series of consonantsFourth character: Number series is increasing by 4 and decreasing by 1 alternately
Q. 19 Find the 5th term: ZBAD, YAZE, XDBG, WCYJ, ?
Check Solution
Ans: A
Please observe the first character: Alphabet series in reverse order starting from Z
Second character: Alphabet positions have been swapped at every alternate step
Third character: Mirror image series: A, Z, B, Y, C, X,….Fourth character: Alphabet is increasing sequentially with differences of 1, 2, 3, etc.
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