25
mean average = sum of dataset / number of items in dataset = (14 + 18 + 13 + 15) / 4 = 60/4 = 15
They are 13, 14, 15, 16 and 17.
18
93
the average age is 14-18 or 14-17. other age ranges include 15-17 15-18 15-19 15-20 and 14-20, but the average is 14-18
25
The Least Common Multiple (LCM) of 15, 14, and 18 is 630.
mean average = sum of dataset / number of items in dataset = (14 + 18 + 13 + 15) / 4 = 60/4 = 15
you add 10 to each number in the series of three. If you break the pattern into groups of three you will see 8-14-5 then 18-24-15 then 28-34. . . so 8+10=18+10=28, 14+10=24+10=34, 5+10=15+10=25, so continuing the pattern would be starting at 28: 28-34-25-38-44-35-48-54-45. . .
25 every third number add 10 14 / 24 / 34 5 / 15 / 25 18 / 28 / (38) 14 5 18 24 15 28 34 25 38 44 35 48 54 45 58 64 55 68 74 and so on ...
7/9 - 5/6 = 14/18 - 15/18 = -1/18
18
The Least Common Multiple (LCM) for 14 15 18 is 630.
It is 15.
630
14/21 * 15/18 = 2/3 * 5/6 = 5/9