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q23

23If 5432*7 is divisible by 9, then the digit in place of * is
  • Option : B
  • Explanation : A number is divisible by 9 if the sum of its digits is divisible by 9.Let the number be x. ∴5 + 4 + 3 +2 + x + 7 = 21 + x If we put x = 6, then it is divisible by 9. ∴ x= 6 Hence, the digit in place of * is 6.
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