0
With only two numbers it is difficult to find a pattern but I would imagine that this is a simple one since those are the only two numbers provided. If you do 21-13=8 you see that the difference is 8 so therefore, you would add 8 to each continuing number of the sequence.
The pattern would be 13, 21, 29, 37, 45, 53, 61, 69
Still curious? Ask our experts.
Chat with our AI personalities
ReneChange my mind. I dare you.
Chat with Rene
JordanLooking for a career mentor? I've seen my fair share of shake-ups.
Chat with Jordan
SteveKnowledge is a journey, you know? We'll get there.
Chat with SteveAdd your answer:
Earn +20 ptsQ: What is the next number 13 21?
Write your answer...
Submit
Still have questions?
Continue Learning about Other Math
What is the next number in the series 13 18 16 21 19?
24, they are going up in 3's, 13, 16, 19 and 18, 21 so next number is 24.
The next number in the series 13 1816 21 19?
24
What number comes next 4 13 19 21 29?
35
Which number is next in series 1-1-2-3-5-8-13?
21
Find the next number in the series 1 3 7 13 21 31?
43
Trending Questions
Find the LCM of 7 14?
What is the average speed on an ant that crawls 1 m in 45 seconds?
How many significant figures are in 25300?
Was does 0011001mean?
Is 234678 divisible by 4?
What is a distinct pure substance composed of two or more elements in whole number ratios?
Commutative property in math?
What is approximately equal to 3.1415?
What is the purpose of exponential averaging technique?
When a ray passes through two parallel slabs what will be the angle of deviation?
What is contraction of would not?
How many children did Gloria Ford Gilmer have?
Example of radical in addition?
What is the sum of all the numbers in row 50 of Pascal's triangle?
What is 12 divided by negative 18?
What to do with a two digit divisor in long division?
What is three fourths minus one fifth?
How many lines does it take to connect every corner of a pentagon with every other corner?
What is 842 divided by 7?
What is the answer on a calculator called?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.