A number is a multiple of 99 if it's a multiple of 9 and 11 at the same time
99 = 3² x 11
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2.50
There is no divisibility rule for 13 because it is a prime number. If you are thinking: why is there a divsibility rule for 2 and 3 then. Well, i don't know so go look it up on google.
samyoora fiklan
It is 3 6 9
Just carry out the division.