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Number Series - Beginner-Intermediate Level: mixed operation series BEGINNER-INTERMEDIATE

Ready to master number series? This benchmark test features 20 beginner-intermediate-level challenges. Worksheet 12 of 30 sharpens your mixed operation series skills. Master cube series, fibonacci patterns, prime series through guided practice. Perfect for developing test preparation.

📝 Worksheet 12 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner-intermediate level

What you'll learn in this worksheet:
Your progress through Number Series
Worksheet 12 of 30 (40% complete)

Question 1

Find the next term in the series: 55, 66, 77, 88, 99, ?
This is a series of palindromic numbers (numbers that read the same forwards and backwards). The next palindrome after 99 is 101
palindrome, numbers

Question 2

Find the next term in the series: 181, 191, 202, 212, 222, ?
This is a series of palindromic numbers (numbers that read the same forwards and backwards). The next palindrome after 222 is 232
palindrome, numbers

Question 3

Find the next term in the series: 1, 2, 6, 24, 120, ?
This is a factorial series: 1!, 2!, 3!... Next term = 6! = 720
factorial, growth

Question 4

Find the next term in the series: 131, 137, 139, 149, ?
This is a series of consecutive prime numbers. The next prime after 149 is 151
prime, numbers

Question 5

Find the next term in the series: 444, 454, 464, 474, ?
This is a series of palindromic numbers (numbers that read the same forwards and backwards). The next palindrome after 474 is 484
palindrome, numbers

Question 6

Find the next term in the series: 212, 222, 232, 242, 252, 262, ?
This is a series of palindromic numbers (numbers that read the same forwards and backwards). The next palindrome after 262 is 272
palindrome, numbers

Question 7

Find the next term in the series: 6, 7, 10, 15, 22, 31, ?
The differences between terms increase by 2 each time. Last difference was 9, next difference is 11, so next term = 31 + 11 = 42
difference, pattern

Question 8

Find the next term in the series: 6, 24, 120, 720, ?
This is a factorial series: 3!, 4!, 5!... Next term = 7! = 5040
factorial, growth

Question 9

Find the next term in the series: 424, 434, 444, 454, 464, ?
This is a series of palindromic numbers (numbers that read the same forwards and backwards). The next palindrome after 464 is 474
palindrome, numbers

Question 10

Find the next term in the series: 3, 5, 3, 11, 19, 33, ?
This is a Tribonacci series where each term is the sum of the previous three terms. Next term = 33 + 19 + 11 = 63
fibonacci, recursive

Question 11

Find the next term in the series: 6, 9, 15, 27, 51, 99, ?
Each term follows: (previous term × 2) - 3. Next term = (99 × 2) - 3 = 195
multiplication, addition

Question 12

Find the next term in the series: 6, 9, 15, 24, 36, 51, ?
The differences between terms increase by 3 each time. Last difference was 15, next difference is 18, so next term = 51 + 18 = 69
difference, pattern

Question 13

Find the next term in the series: 232, 242, 252, 262, 272, ?
This is a series of palindromic numbers (numbers that read the same forwards and backwards). The next palindrome after 272 is 282
palindrome, numbers

Question 14

Find the next term in the series: 1, 8, 27, 64, ?
This is a series of consecutive perfect cubes: 1³, 2³, 3³... Next term = 5³ = 125
perfect, cubes

Question 15

Find the next term in the series: 1, 2, 8, 11, 21, 40, 72, ?
This is a Tribonacci series where each term is the sum of the previous three terms. Next term = 72 + 40 + 21 = 133
fibonacci, recursive

Question 16

Find the next term in the series: 1, 2, 6, 24, 120, ?
This is a factorial series: 1!, 2!, 3!... Next term = 6! = 720
factorial, growth

Question 17

Find the next term in the series: 3/6, 3/7, 3/8, 3/9, 3/10, 3/11, ?
The denominator increases by 1 each time while numerator remains 3. Next term = 3/12
fraction, pattern

Question 18

Find the next term in the series: 12, 21, 39, 75, ?
Each term follows: (previous term × 2) - 3. Next term = (75 × 2) - 3 = 147
multiplication, addition

Question 19

Find the next term in the series: 3/6, 3/7, 3/8, 3/9, 3/10, ?
The denominator increases by 1 each time while numerator remains 3. Next term = 3/11
fraction, pattern

Question 20

Find the next term in the series: 2, 6, 24, 120, ?
This is a factorial series: 2!, 3!, 4!... Next term = 6! = 720
factorial, growth
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