The factors of 81 that are between 2 and 10 are 3 and 9.
1 and 81 Those two numbers certainly divide into 81 though they are not the only numbers to do so.
Just 3.
The two squared numbers that divide to make 9 are 81 and 9. When you calculate (81 \div 9), you get 9, and both 81 (which is (9^2)) and 9 (which is (3^2)) are perfect squares.
Divide both numbers by 9 (a factor of both 72 and 81) and you get 8/9
1
1 and 81 Those two numbers certainly divide into 81 though they are not the only numbers to do so.
Just 3.
Yes, these numbers: 1, 3, 9, 27, 81.
16 and 81 are the only two.
The two squared numbers that divide to make 9 are 81 and 9. When you calculate (81 \div 9), you get 9, and both 81 (which is (9^2)) and 9 (which is (3^2)) are perfect squares.
You have to divide by 10. This is because there are 10millimetres in every cm. i.e. 81/10 gives you 8.1cm.
You add up the numbers, then divide by how many numbers you added. Here there are 4 numbers to add up: 81+83+87+85. Use a calculator or do longhand. Then divide the sum by 4 to get the average.
Divide both numbers by 9 (a factor of both 72 and 81) and you get 8/9
6.9877
16, 81, 625
1
27 and 81 are a possibility. Also numbers like 5 and 10, 20 and 40.