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Mixed Series - Beginner Level: complex sequences BEGINNER

Level up your mixed series skills with this entry level practice. 20 beginner-level problems await in Worksheet 4 of 30. Focus area: complex sequences. Learn mixed character series, pattern recognition, alternating series through systematic practice. Designed for entry-level learners seeking foundational concepts and basic patterns.

📝 Worksheet 4 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner level

What you'll learn in this worksheet:
Your progress through Mixed Series
Worksheet 4 of 30 (13% complete)

Question 1

Find the next item in the series: 1, A, 4, B, 9, ?
Alternating perfect squares (starting from 1²=1) and corresponding letters. Next is C
squares, letters

Question 2

Find the next item in the series: A, 5, D, 20, G, 80, ?
Numbers multiply by 4, letters advance by 3. Next is J
geometric, alphabet

Question 3

Find the next item in the series: 8, B, 27, C, 64, ?
Alternating perfect cubes (starting from 2³=8) and corresponding letters. Next is D
cubes, letters

Question 4

Find the next item in the series: C, 5, H, 13, U, ?
Fibonacci sequence (3, 5, ...) with alternating numbers/letters. Next Fibonacci number is 34, so answer is 34
fibonacci, letters

Question 5

Find the next item in the series: 3, U, 5, O, 7, I, ?
Numbers increase by 2, vowels reverse A-E-I-O-U pattern. Next is 9
arithmetic, vowels

Question 6

Find the next item in the series: 2, O, 6, I, 24, ?
Alternating factorial numbers (2, 6, ...) and vowels in reverse order. Next is E
factorial, vowels

Question 7

Find the next item in the series: U, 6, A, 24, ?
Alternating factorial numbers (6, 24, ...) and vowels in forward order. Next is E
factorial, vowels

Question 8

Find the next item in the series: 27, C, 64, D, 125, E, 216, ?
Alternating perfect cubes (starting from 3³=27) and corresponding letters. Next is F
cubes, letters

Question 9

Find the next item in the series: 10, M, 12, N, 14, O, ?
Alternating series: numbers follow increasing by 2 pattern, letters follow forward by 1 pattern. Next number is 16
alternating, basic

Question 10

Find the next item in the series: 1, C, 3, E, 8, ?
Fibonacci sequence (1, 2, ...) with position-based letters. Next Fibonacci number is 13, so answer is G
fibonacci, letters

Question 11

Find the next item in the series: 4, P, 9, R, 16, T, 25, ?
Two independent patterns: numbers follow square progression, letters follow forward pattern. Next letter is V
double, interleaved

Question 12

Find the next item in the series: 4, L, 9, I, 16, F, 25, ?
Two independent patterns: numbers follow square progression, letters follow backward pattern. Next letter is C
double, interleaved

Question 13

Find the next item in the series: 2, C, 5, H, ?
Fibonacci sequence (2, 3, ...) with alternating numbers/letters. Next Fibonacci number is 13, so answer is 13
fibonacci, letters

Question 14

Find the next item in the series: 25, J, 36, N, 49, R, ?
Alternating series: numbers follow squares of 5, 6, ... pattern, letters follow forward by 4 pattern. Next number is 64
alternating, basic

Question 15

Find the next item in the series: A, 9, E, 14, I, 19, ?
Numbers increase by 5, vowels cycle through A-E-I-O-U pattern. Next is O
arithmetic, vowels

Question 16

Find the next item in the series: 19, C, 23, B, 29, ?
Alternating prime numbers and consonants. Next is Z
primes, consonants

Question 17

Find the next item in the series: P, 16, L, 64, V, ?
Alternating powers of 4 (4^2=16, 4^3=64, ...) and corresponding letters. Next is 256
power, exponential, letters

Question 18

Find the next item in the series: M, 14, O, 16, Q, 18, ?
Alternating between letters and their positions in alphabet (A=1, B=2, ...). Letters advance by 1 each time. Next is S
alphabet, position

Question 19

Find the next item in the series: D, 4, H, 8, P, ?
Alternating powers of 2 (2^2=4, 2^3=8, ...) and corresponding letters. Next is 16
power, exponential, letters

Question 20

Find the next item in the series: A, 1, B, 3, ?
Fibonacci sequence (1, 1, ...) with alternating numbers/letters. Next Fibonacci number is 5, so answer is E
fibonacci, letters
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