76
72
All are composite except 61 and 67. Composite numbers: 60, 62, 63, 64, 65, 66, 68, 69, 70
64-65-66-67 chevelle.
There are 3 prime numbers between 64 and 77: 67 71 73.
66 + 67 + 68
The numbers are 65, 66, and 67..
The average of the five numbers is 65 + 64 + 81 + 74 + 67 = 351/5 = 70.2.
13, which is the difference between the highest and lowest numbers, 67 and 54.
64 65 66 67
They are: 65+66+67 = 198
65 66 and 67 will interchange.
0.0149