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XAT 2024 — QA & DI Question 13

DivisibilityEasy

Consider a 4-digit number of the form abbb, i.e., the first digit is a (a > 0) and the last three digits are all b. Which of the following conditions is both NECESSARY and SUFFICIENT to ensure that the 4-digit number is divisible by a?

Answer & solution

  • A

    b is divisible by a

  • B

    b is equal to 0

  • C

    21b is divisible by a

  • D

    9b is divisible by a

  • 3b is divisible by a

XAT 2024 QA & DI Q13: Consider a 4-digit number of the form abbb, i.e., the first digit is a (a > 0) and the last three digits are a — Solution | TheCATExam