Each number is the square of the previous number.
81
243
9 243 - 81 = 162 81 - 27 = 54 162 = 54 * 3 54 = 18 * 3 27 - 18 = 9
It is 3 followed by 1
27
81
81
Divide by 3
243
9 243 - 81 = 162 81 - 27 = 54 162 = 54 * 3 54 = 18 * 3 27 - 18 = 9
81
81 Each number is 3 x the previous number. So, 3 x 27 = 81.
It is 3 followed by 1
3-1-.33 repeating
9 * 9 = 81 and3*3*3*3 = 81
The multiples of 81 are infinite. The factors of 81 are: 1, 3, 9, 27, 81.
1, 3, 9, 27, 81. 1 x 81 = 81, 3 x 27 = 81, 9 x 9 = 81.