Start learning →

SNAP Number System — practice questions — page 3

Explore 107 free Number System questions in SNAP Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

Practise Number System with Quill →

Number System questions and exercises with answers

Showing questions 61–90 of 107.

HCF(6, 20) is 2 and LCM(6, 20) is:Read the answer and worked solution →HCF is the product of the smallest power of each common prime; LCM is the product of the:Read the answer and worked solution →For two positive integers a and b, HCF(a, b) x LCM(a, b) equals:Read the answer and worked solution →LCM(6, 72, 120) is:Read the answer and worked solution →A number that cannot be written as p/q with integers p and q (q not zero) is:Read the answer and worked solution →The proof that root 2 is irrational uses the technique of:Read the answer and worked solution →If p is a prime and p divides a squared, then p divides:Read the answer and worked solution →The sum of a rational and an irrational number is:Read the answer and worked solution →A rational number has a terminating decimal expansion only when its denominator's prime factors are:Read the answer and worked solution →Counting eggs that leave remainders 1, 2, 3, 4, 5 in pairs, threes, fours, fives, sixes and none in sevens, under 150, gives:Read the answer and worked solution →Catch the irrationalsRead the answer and worked solution →Pop the number wordsRead the answer and worked solution →Run the HCF and LCM numbersRead the answer and worked solution →Slice the number theory wordsRead the answer and worked solution →Rational or irrationalRead the answer and worked solution →Sort Euclid, factorisation and decimalsRead the answer and worked solution →Type the numberRead the answer and worked solution →Number system bingoRead the answer and worked solution →The largest positive integer that divides both of two numbers is their:Read the answer and worked solution →The algorithm that finds that largest common divisor by repeated division is named after:Read the answer and worked solution →Using that algorithm on 455 and 42, the first step gives 455 = 42 times 10 plus:Read the answer and worked solution →Continuing, 42 = 35 times 1 plus 7, then 35 = 7 times 5 plus 0. The largest common divisor is:Read the answer and worked solution →The theorem saying every composite number can be written as a product of primes is the:Read the answer and worked solution →Writing 20 as 2 times 2 times 5 is an example of:Read the answer and worked solution →The highest common factor of 6 and 20 is:Read the answer and worked solution →The lowest common multiple of 6 and 20 is:Read the answer and worked solution →The highest common factor is found by taking, for each common prime, the:Read the answer and worked solution →The lowest common multiple is found by taking, for each prime involved, the:Read the answer and worked solution →For any two positive integers, the product of their highest common factor and lowest common multiple equals:Read the answer and worked solution →The prime factorisation of 96 gives a highest common factor with 404 of:Read the answer and worked solution →

Worked practice questions

HCF(6, 20) is 2 and LCM(6, 20) is:

  1. 30
  2. 10
  3. 60
  4. 120
Show answer and solution

Correct answer: C. 60

1. 6 is 2 x 3 and 20 is 2 x 2 x 5. 2. Take the greatest power of each prime. 3. 2 x 2 x 3 x 5 is 60. _Source: syllabus Mathematics, Chapter 1, Real Numbers._

Open this question →

HCF is the product of the smallest power of each common prime; LCM is the product of the:

  1. Smallest power of each prime
  2. Sum of all the prime factors
  3. Common prime factors only
  4. Greatest power of each prime
Show answer and solution

Correct answer: D. Greatest power of each prime

1. Every prime involved counts. 2. Use its greatest power. 3. That gives the LCM. _Source: syllabus Mathematics, Chapter 1, Real Numbers._

Open this question →

For two positive integers a and b, HCF(a, b) x LCM(a, b) equals:

  1. a x b
  2. a + b
  3. a - b
  4. a / b
Show answer and solution

Correct answer: A. a x b

1. Check with 6 and 20: 2 times 60 is 120. 2. That equals 6 times 20. 3. Use it to find LCM once HCF is known. _Source: syllabus Mathematics, Chapter 1, Real Numbers._

Open this question →

How to practise

  1. Choose a Number System question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Quantitative Aptitude topics

Quantitative AptitudeAlgebraTime Speed and DistanceTime and WorkModern MathematicsRatio and ProportionSpeed DistanceSimple Interest