25 + 16 - 13 - 21 = 7
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.
22
When put in order, the numbers are: 16, 18, 24, 25, 26, 27, 31, 32 and 2123. The median is the middle number, which is 26. If you mean the 2123 to be 21 and 23, then the numbers are: 16, 18, 21, 23, 24, 25, 26, 27, 31 and 32. In this case, there is an even amount of numbers, so the median is the value halfway between the two middle numbers. They are 24 and 25, so the median is 24.5 as your answer.
21 is not the square of an integer. The closest square number is 25.
20.37 is the mean.
The number 1 is neither prime nor composite. The numbers 25, 16, 21, and 27 are divisible by factors that are not one or the number itself. 19 is the only one that has only 1 and itself as factors, so it is a prime number.
25 + 16 - 13 - 21 = 7
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.
15, 16, 21, 23, 25
The common terms in the two sequences are 21 and 466. Therefore, the number of common terms is 2.
22
The median of a set of numbers is the middle number when the numbers are listed in numerical order. When there are an even number of data items in the set, then the median is the mean average of the middle two numbers. In the set {16, 25} there are two data items, so the median is the mean average of the middle two (which for a set of 2 is both the numbers) → median = (16 + 25) ÷ 2 = 20.5
19 + 21 + 23 + 37 = 100 There are 4 numbers so mean = sum/number = 100/4 = 25
37
GCF of 21 and 42: 21GCF of 16 and 25: 1
When put in order, the numbers are: 16, 18, 24, 25, 26, 27, 31, 32 and 2123. The median is the middle number, which is 26. If you mean the 2123 to be 21 and 23, then the numbers are: 16, 18, 21, 23, 24, 25, 26, 27, 31 and 32. In this case, there is an even amount of numbers, so the median is the value halfway between the two middle numbers. They are 24 and 25, so the median is 24.5 as your answer.