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Indian Air Force Group X Divisibility Rules — practice questions

Explore 2 free Divisibility Rules questions in Indian Air Force Group X Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Divisibility Rules questions and exercises with answers

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If the number x4584 is divisible by 11, what is the value of x?Read the answer and worked solution →If the number x4461 is divisible by 11, what is the face value of x?Read the answer and worked solution →

Worked practice questions

If the number x4584 is divisible by 11, what is the value of x?

  1. 4
  2. 3
  3. 2
  4. 5
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Correct answer: B. 3

1. Divisibility by 11: difference of sums of alternate digits is a multiple of 11. 2. For x4584: (x + 5 + 4) − (4 + 8) = (x + 9) − 12 = x − 3. 3. x − 3 = 0 gives x = 3. _Source: RRB Group D CEN-02/2018 PYQ, Q.38._

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If the number x4461 is divisible by 11, what is the face value of x?

  1. 2
  2. 5
  3. 3
  4. 4
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Correct answer: B. 5

1. Divisibility by 11 uses the alternating sum of digits from the right: 1, 6, 4, 4, x. 2. (1 + 4 + x) - (6 + 4) = (5 + x) - 10 = x - 5. 3. For divisibility, x - 5 must be 0, so x = 5. _Source: RRB Group D CEN-02/2018 PYQ, Q.82._

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