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Q: Is 5 9 13 17 21 25 29 33 37 41 what is the pattern?

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3, 13, 17, 23 are prime numbers. The others are not.

5, 13 and 17 are prime.

Arithmetic

You have to find a pattern in the numbers, and exclude the one that messes up the pattern.

Mode is the most frequent. Sorting to make it easier to see the frequency of the numbers: {13, 16, 17, 21, 25, 25, 30} - 25 appears twice and every other number once. Thus: mode of the numbers is 25.

13/15 = 65/75 21/25 = 63/75 13/15 is bigger.

Assuming the pattern would continue: 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13...

It is 4n+5 and so the next term will be 25

25 + 16 - 13 - 21 = 7

They are all prime numbers except for 15 21 25 and 27 which are composite numbers

17/25 is greater.

The number relates to the size die it can take. mhp 17 is 17" 21 is 21" 25 is 25".

Mean is the average of all the numbers.Sum of all the listed numbers = 584Total of all the listed numbers = 25584 / 25 = 23.36Mean = 23.36

16 changes. (6-0; 7-0; 13-0; 14-0; 14-3; 20-3; 21-3; 21-9; 21-10; 21-16; 21-17; 27-17; 28-17; 28-23; 28-25; 31-25 ) i believe this to be accurate

They are 11, 13, 15, 17, 19, 21, 23, 25, 27 and 29.

9, 15, 21, 25 and 27 aren't .. because they have more than two divisors.

1+25, 3+23, 5+21, 7+19, 9+17, 11+15 or 13+13 !

13 10 17 15 21 13 - 10 = -3 10 - 17 = +7 17 - 15 = -2 15 - 21 = +6 The negative numbers alternate with the positive numbers The negative numbers are augmented by +1 each step The positive numbers are diminished by -1 each sterp So the next step from 21 is a negative and should be -2 increased by +1 to -1 giving a new value of 20 Then the next step is a positive and should be +6 decreased by -1 to +5 giving 25 13 - 10 = -3 10 - 17 = +7 17 - 15 = -2 15 - 21 = +6 21 - 20 = -1 20 - 25 = +5

They are: 33 29 25 21 17 13 9 a reduction of 4 each time

11 13 15 17 19 21 23 25 27

The next three numbers in the sequence are 23, 25, and 27.

The nth term is 25-4n and so the next term will be 5

21

13

The range of 10, 13, 22, 25, and 31 is 21.