Divides by 9?
What number would need to be added to the following number to make it divisible by 9?
Clarification : The subscript indicates base 12.
Hint : There is no need to convert the above number to decimal or use a calculator. Good luck!
Try more questions on Bases .
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1 solution
Since ( 1 2 1 0 ) 2 divides evenly by 9 , you need only look at the last two digits. In base 1 2 , 2 1 1 2 doesn't divide by 9 , but 2 3 1 2 does. ( 2 ∗ 1 2 + 3 ) 1 0 = ( 2 7 ) 1 0 . Therefore, you would need to add 2 to this number to make it divisible by 9 .