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NMAT Number System — practice questions — page 5

Explore 136 free Number System questions in NMAT Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Number System questions and exercises with answers

Showing questions 121–136 of 136.

The highest common factor of 6, 72 and 120 is:Read the answer and worked solution →The lowest common multiple of 6, 72 and 120 is:Read the answer and worked solution →For three numbers, the product of the numbers is:Read the answer and worked solution →Knowing the highest common factor of two numbers lets you find their lowest common multiple by:Read the answer and worked solution →If two numbers share no prime factor at all, their highest common factor must be:Read the answer and worked solution →A number like root 2, which cannot be written as a ratio of integers, is described as:Read the answer and worked solution →If a prime p divides the square of a number a, the theorem states that p also divides:Read the answer and worked solution →The two main tools introduced for studying real numbers here are prime factorisation and:Read the answer and worked solution →Catch the prime factorsRead the answer and worked solution →Pop the correct answersRead the answer and worked solution →Run the factor gatesRead the answer and worked solution →Slice the number wordsRead the answer and worked solution →Smallest or greatest powerRead the answer and worked solution →Sort the resultsRead the answer and worked solution →Type the numberRead the answer and worked solution →Number theory bingoRead the answer and worked solution →

Worked practice questions

The highest common factor of 6, 72 and 120 is:

  1. 4
  2. 2
  3. 3
  4. 6
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Correct answer: D. 6

1. The common primes are 2 and 3. 2. The smallest powers are 2 and 3 themselves. 3. The answer is 6. _Source: syllabus Mathematics, Chapter 1, Real Numbers._

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The lowest common multiple of 6, 72 and 120 is:

  1. 360
  2. 720
  3. 240
  4. 180
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Correct answer: A. 360

1. Take 8 for the twos and 9 for the threes. 2. Multiply by 5 as well. 3. The answer is 360. _Source: syllabus Mathematics, Chapter 1, Real Numbers._

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For three numbers, the product of the numbers is:

  1. Always equal to LCM only
  2. Not equal to HCF times LCM
  3. Always equal to HCF times LCM
  4. Always equal to HCF only
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Correct answer: B. Not equal to HCF times LCM

1. The rule for two numbers does not extend. 2. Check with 6, 72 and 120. 3. The product is not equal to HCF times LCM. _Source: syllabus Mathematics, Chapter 1, Real Numbers._

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More Quantitative Aptitude topics

Quantitative AptitudeAlgebraRatio and ProportionTime, Speed and DistanceTime and WorkPercentagesSimple InterestProfit and Loss