Yes. Because 81 can be equally divided by 3. 81/3+27
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81 is the square of 9, and is also a multiple of 3 because 3(27) = 81.
9 * 9 = 81 and3*3*3*3 = 81
nope, its a multiple of 81 tho =/
No but it's a multiple of 9 and 3
9, 36, 81 etc