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
54, 63, 72, 81, 90, 99.
They are: 54, 63, 72, 81, 90, 99.
72, 81, 90
72 less than 81 is calculated by subtracting 72 from 81. This gives us 81 - 72 = 9. Therefore, 72 less than 81 is 9.
54, 63, 72, 81, 90, and 99 is.
72 out of 81 is 88.89%.
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