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What digit must replace the blank in 7_5 to make it divisible by 9?

Class 6Divisibility RulesPlaying with Numbers
  • A6
  • B12
  • C7
  • D5

Step-by-Step Solution

For divisibility by 9, the digit sum must be a multiple of 9. 7 + blank + 5 = 12 + blank. The smallest multiple of 9 at least 12 is 18, so blank
Answer: A) 6

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