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uysha [10]
3 years ago
8

Find the digit that makes _ 3520 by 9

Mathematics
1 answer:
olga nikolaevna [1]3 years ago
7 0
Remember the divisibility rule for 9. The sum of the digits of the number must be divisible by nine. 
Let the digit be x. Then x+3+5+2+0=x+10 has to be divisible by nine. Recalling that 18=9*2, we note that x=8. 
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