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Tuniss
 243 in exponential form would be 3^5. 
MissPhiladelphia
The number 243 is divisible because the sum of its digit is divisible by 3. You can express 243 by its factors 3 raised to 5, (3)^5. To explain this further it is 3 x 3 x 3 x 3 x 3 =243. I hope my explanation helps you in your problem

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