RRB(Railway) Practice Question and Answer

Q: Find the highest common factor of 36 and 84. 1908 0

  • 1
    4
    Correct
    Wrong
  • 2
    6
    Correct
    Wrong
  • 3
    12
    Correct
    Wrong
  • 4
    18
    Correct
    Wrong
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Answer : 3. "12"

Q: If the numerator of a fraction is increased by 20% and the denominator is not changed, the resultant fraction thus obtained is \({2\over3}\). What was the original fraction? 1372 0

  • 1
    \({3\over8}\)
    Correct
    Wrong
  • 2
    \({5\over8}\)
    Correct
    Wrong
  • 3
    \({4\over9}\)
    Correct
    Wrong
  • 4
    \({5\over9}\)
    Correct
    Wrong
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Answer : 4. "\({5\over9}\)"

Q: If the value of 16a+16b=42. What is the average of (a+b)? 3162 0

  • 1
    44
    Correct
    Wrong
  • 2
    21
    Correct
    Wrong
  • 3
    24
    Correct
    Wrong
  • 4
    24
    Correct
    Wrong
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Answer : 2. "21"

Q: What is the least number to be added to 1500 to make it a perfect square? 2026 0

  • 1
    21
    Correct
    Wrong
  • 2
    35
    Correct
    Wrong
  • 3
    43
    Correct
    Wrong
  • 4
    69
    Correct
    Wrong
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Answer : 1. "21"

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