Just over 20
18 + 19 + 21 + 23 = 81
81 / 4 (numbers) = 20.25
23
5
22
All the numbers are composite except the ones in bold: 18 19 20 21 22 23 24 25.
(-18-23+20)/3= (-21)/3=-7
20.37 is the mean.
which of the numbers 19 21 23 and 25 has the most factors
21 is composite. 19 and 23 are prime.
Hourly
20 21 22 23 24 18 19
Average of 21, 24, 21 and 23 = (21+24+21+23)/4 = 22.25
23