Triangular Numbers series.The nth triangular number can be calculated by using the formula:n(n+1)/2
It depends on whether they are being arranged in a line or a circular pattern. In a line: 15*14*13 = 2730 ways. In a circular pattern : ABC, BCA and CAB will be the same pattern, only rotated. So the answer is 15*14*13/3 = 910 ways.
15 is a composite number
They are 40, 53 and 68 and the pattern is 5 7 9 11 13 15
1 2 3 5 7 11 13 15
Triangular Numbers series.The nth triangular number can be calculated by using the formula:n(n+1)/2
13+2=15+4=19+6=25 The 2 keeps doubling. Hope this helped you!!
You can have infinitely many mathematical expressions that equal 13. Or any other given number. For example, 13 + 0, 12 + 1, 11 + 2, etc., then 0 + 13, - 1 + 14, -2 + 15, etc. ... there you have infinitely many. You can make up lots of other types of expressions that give the same result.
It depends on whether they are being arranged in a line or a circular pattern. In a line: 15*14*13 = 2730 ways. In a circular pattern : ABC, BCA and CAB will be the same pattern, only rotated. So the answer is 15*14*13/3 = 910 ways.
28
15 is a composite number
Remember what each of these terms represent. Mean = Mathematical Average Median = Middle value (exactly half of values are above and below) Mode = Most frequent value There are multiple possible answers, however here is one: 13, 13, 15, 15, 19 The mean is: (13 + 13 + 15 + 15 + 19)/5 = 75/5 = 15 The middle value (the median) is 15. Another way to say this is that, if we were to list all the values as shown above there are two before 15 and two after 15; therefore the median is 15. In this data set the value 13 occurs twice, 15 occurs twice, and 19 occurs once. Both 13 and 15 occur the most frequently therefore they are both the mode.
15-X
-28
They are 40, 53 and 68 and the pattern is 5 7 9 11 13 15
12 + 13 + 15 = 4012 + 13 + 15 = 4012 + 13 + 15 = 4012 + 13 + 15 = 40
12 + 13 + 15 = 4012 + 13 + 15 = 4012 + 13 + 15 = 4012 + 13 + 15 = 40