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      Question

      This question is based on the following 3-digit

      numbers: 543, 769, 552, 342, 245 (Example: 697 – First digit = 6, second digit = 9, and third digit = 7) If in each of the numbers, 1 is added to the first digit of every number, in how many numbers will the first digit be exactly divisible by the third digit of the same number?
      A Three Correct Answer Incorrect Answer
      B Five Correct Answer Incorrect Answer
      C Two Correct Answer Incorrect Answer
      D Four Correct Answer Incorrect Answer

      Solution

      ATQ,

      Add 1 to the first digit of each number and check if it's divisible by the third digit: 543 β†’ 6 Γ· 3 βœ… 769 β†’ 8 Γ· 9 ❌ 552 β†’ 6 Γ· 2 βœ… 342 β†’ 4 Γ· 2 βœ… 245 β†’ 3 Γ· 5 ❌ βœ… Total valid numbers = 3

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