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Alphanumeric Series - Intermediate-Advanced Level: mixed character logic INTERMEDIATE-ADVANCED

This fundamentals focus worksheet contains 20 intermediate-advanced-level alphanumeric series problems. Worksheet 21 of 30 focuses on mixed character logic. Practice series completion, pattern recognition, alphanumeric reasoning with our step-by-step solutions. Difficulty: advanced concepts with increasing complexity. Recommended for advanced developing learners.

📝 Worksheet 21 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate-advanced level

What you'll learn in this worksheet:
Your progress through Alphanumeric Series
Worksheet 21 of 30 (70% complete)

Question 1

Find the next term in the series: O1, Q3, S5, U7
This series alternates letters and numbers, each increasing by 2.
Last term: U7 → next: W9.
series, next term

Question 2

Find the next term: Q1, R4, S9, T16
Number is term position squared (1,4,9,16,25). Letter increases by one each time.
series, math transform

Question 3

Find the next group in the series: FG1617, HI1819, KL2021
Groups: Letter steps follow Fibonacci (1,2,3,5), numbers increase by 2 each time. Next is PQ2223.
series, grouped

Question 4

What comes next: F1, I4, L7, O10 ?
Letters move +3, numbers +3. Continue pattern: next is R13.
series, pattern

Question 5

Find the next term: S1, T4, U9, V16
Number is term position squared (1,4,9,16,25). Letter increases by one each time.
series, math transform

Question 6

Find the next term: G, 7, J, 10, M, ?
Odd terms: letters +3; Even terms: numbers +3.
series, alternate

Question 7

Find the next term in the series: A0!, C3@, E6#, G9$, I2%
Letters advance by +2 (mod 26), digits advance by +3 (mod 10), symbols cycle through ['!', '@', '#', '$', '%']. Next term: letter=K, digit=5, symbol=^ → K5^.
symbol, group, series

Question 8

Find the next term: I1, L4, O7, R10
Letters move by +3, number increments by 3. Wraparound used for letters.
series, modular

Question 9

What is the next term in the sequence: M0, O3, Q6, S9, U2?
Letters advance by 2 (starting M), digits advance by 3 (mod 10).
multi_skip, double_encode

Question 10

Find the next term: P1, Q4, R9, S16
Number is term position squared (1,4,9,16,25). Letter increases by one each time.
series, math transform

Question 11

What comes next: I1, L4, O7, R10 ?
Letters move +3, numbers +3. Continue pattern: next is U13.
series, pattern

Question 12

Find the next term if odd position letters advance by 3, even position numbers follow (i+2)*2: P4, U4, V8, A8, B12
Odd-indexed positions: letter advances by 3 from P, number = (position+2)×2 = 14 at position 5. Next term: E14.
embed_logic, series

Question 13

Find the missing term in the series: I2, K3, M4, ?, Q6
Each step adds 2 to letter and 1 to number.
The missing term comes fourth: O5.
series, missing term

Question 14

Find the next term: O1, S5, W9, A13
Letters move by +4, number increments by 4. Wraparound used for letters.
series, modular

Question 15

Find the missing term in the series: C2, E4, G6, ?, K10
Each step adds 2 to letter and 2 to number.
The missing term comes fourth: I8.
series, missing term

Question 16

What comes next in the hybrid series: C10, F20, J40, O80
Letters move by steps: 2, 3, 4, 5, numbers double each time. Next step +6 for letter, ×2 for number.
series, hybrid

Question 17

Find the next term: G, 7, J, 10, M, ?
Odd terms: letters +3; Even terms: numbers +3.
series, alternate

Question 18

In sequence: A7, C6, E5, G4, I3, K2, M1, what is the term 2 positions before the 4th term?
Reference required position backward.
reverse, crossref, series

Question 19

Find the next term in the series: H1, I3, J6, K10
Pattern: Letter increases by 1 each position, Number is the triangular number (1, 3, 6, 10, 15...).
Position 5: Letter = L, Number = 15 → L15
series, position

Question 20

Find the next term in the series: B1, D3, F5, H7
This series alternates letters and numbers, each increasing by 2.
Last term: H7 → next: J9.
series, next term
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