It looks like it is just minus nine each time.
The first number is 9 x 10, then 9 x 9, then 9 x 8.
as in the multiples? 9 18 27 36 45 54 63 72 81 90 99 ...
It is 83 because it is a prime number
77+72+90+70+81=390 390/5=78
72, 81, 90
They are: 54, 63, 72, 81, 90, 99.
54, 63, 72, 81, 90, 99.
72 less than 81 is calculated by subtracting 72 from 81. This gives us 81 - 72 = 9. Therefore, 72 less than 81 is 9.
72 out of 81 is 88.89%.
54, 63, 72, 81, 90, and 99 is.
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.
18 27 36 45 54 63 72 81 90
9, 18, 27, 36, 45, 54, 63, 72, 81, 90