9
6, 12, 15 and lots more.
A factor of any number is a multiple of that number as for example 3 is a factor of 24 and it is also a multiple of 3 because 3*8 = 24
Yes, but not all of them. Every multiple of 6 is also a multiple of 3, but there are more multiples of 3 besides those.
Yes 33015/3 is 11005. Here's a tip: if the digits of number add up to a multiple of three, then that number is also a multiple of three.
3, 6, 9, 12, 18, 36
81 is the square of 9, and is also a multiple of 3 because 3(27) = 81.
36
9
To square a number you multiple by itself. For instance, 3 x 3 = 9
The result is a square number as for example 3 times 3 = 9 which is a square number
6, 12, 15 and lots more.
36
36
21
36, 144, 324, 576, 900, ...
Based on your description, it could be 9,4, or 1.
No, 92 is not a multiple of 3. A quick way to check if a number is a multiple of 3 is: add up the digits of the number you are checking; if this sum equals 3 or a multiple of 3, then the number is a multiple of 3. So in this case, 92 --> 9+2=11, which is not a multiple of 3. If you have to you can add again, so for 11 --> 1+1=2, which is not a multiple of 3. You can always repetitively add until you get to a single digit answer: if it's 3,6 or 9 then it's a multiple of 3. Also if your sum is 9 or a multiple of 9, then the original number is a multiple of 9. To check for 6, if a number is a multiple of 3, and also a multiple of 2 (an even number), then the number is a multiple of 6.