1. The HCF of 90, 150 and 210 is
- A6
- B10
- C15
- D30
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Answer: D. 90 = 2 × 32 × 5, 150 = 2 × 3 × 52, 210 = 2 × 3 × 5 × 7. All three primes 2, 3 and 5 are common, so the HCF is 2 × 3 × 5 = 30. 6, 10 and 15 each leave out one common prime.
NUST NET Quantitative Maths chapter 1: Quantitative · Numbers and arithmetic MCQs with answers
By Team Megalecture · Updated 13 Nov 2026
60 exam-style questions on Quantitative · Numbers and arithmetic, each with the answer and a short explanation. Ten of them are below to try. The chapter test draws ten fresh questions each time and is marked the moment you finish, with your score by topic.
60 questions · 3 topics · 10 per test
Test this chapter freeAll NUST NET Quantitative Maths chapters
What chapter 1 covers
- Number properties 20 questions
- Fractions, decimals and order of operations 20 questions
- Exponents, roots and standard form 20 questions
Ten Quantitative · Numbers and arithmetic questions with answers
Try each one, then open the answer. These ten stay the same; the test draws new ones every time.
2. The smallest positive number that leaves a remainder of 3 when divided by 4, by 6 and by 9, and is also divisible by 7, is
- A39
- B75
- C111
- D147
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Answer: D. The number is 36k + 3, since LCM(4, 6, 9) = 36. Trying k = 1, 2, 3, 4 gives 39, 75, 111, 147, and 147 = 7 × 21 is the first multiple of 7.
3. 25 × 23 ÷ 24 is equal to
- A24
- B211
- C212
- D44
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Answer: A. Add powers when multiplying and subtract when dividing: 5 + 3 − 4 = 4, so the answer is 24 = 16. Adding all three powers gives 212.
4. The recurring decimal 0.2777… (the 7 recurring) written as a fraction is
- A2/7
- B5/18
- C27/99
- D27/100
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Answer: B. Let x = 0.2777…; then 100x − 10x = 27.777… − 2.777… = 25, so x = 25/90 = 5/18. 27/99 is 0.2727… and 27/100 is 0.27 exactly.
5. The value of −32 + (−2)3 × 2 − 4 ÷ (−2) is
- A−27
- B−23
- C−9
- D−5
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Answer: B. −32 = −9, (−2)3 × 2 = −16 and 4 ÷ (−2) = −2, so −9 − 16 − (−2) = −23. Reading −32 as +9 gives −5.
6. (3 × 104) + (5 × 103) is equal to
- A3.5 × 103
- B3.5 × 104
- C8 × 104
- D8 × 107
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Answer: B. 30,000 + 5,000 = 35,000 = 3.5 × 104. Adding the front numbers (8) only works when the powers of 10 are the same.
7. How many integers n satisfy −5 ≤ n < 4?
- A6
- B7
- C8
- D9
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Answer: D. The integers are −5, −4, −3, −2, −1, 0, 1, 2, 3: nine of them. −5 is included (≤) but 4 is not (<). Forgetting to count 0 gives 8.
8. Which of these numbers is divisible by 9?
- A3,546
- B4,517
- C6,231
- D7,325
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Answer: A. A number is divisible by 9 when its digit sum is: 3 + 5 + 4 + 6 = 18. The digit sum of 6,231 is 12, so it is divisible by 3 but not by 9.
9. The LCM of 16, 24 and 40 is
- A48
- B80
- C120
- D240
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Answer: D. 16 = 24, 24 = 23 × 3, 40 = 23 × 5. Highest powers: 24 × 3 × 5 = 240. 48, 80 and 120 are the LCMs of only two of the numbers (120 is not a multiple of 16).
10. 0.0625 written as a fraction in its lowest terms is
- A1/1600
- B1/160
- C1/16
- D5/8
Show answer
Answer: C. 0.0625 = 625/10000 = 1/16 (divide by 625). 5/8 is 0.625, one decimal place out.
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Ways to practise this chapter
- Chapter test. Ten questions from Quantitative · Numbers and arithmetic, drawn fresh each time, about ten minutes.
- Practice mode. The right answer and the explanation after every question, with no clock. Exam mode keeps the marks until the end and runs a timer.
- Hints. One tap for a nudge, a second to remove two wrong options.
- My mistakes. Every question you get wrong is kept, and leaves the list once you get it right.
Quantitative · Numbers and arithmetic: questions students ask
How many Quantitative · Numbers and arithmetic MCQs are there?
60, each with the answer and a short explanation, across 3 topics: Number properties, Fractions, decimals and order of operations, Exponents, roots and standard form. Every chapter test draws ten of them, so you can take it many times.
Is the NUST NET Quantitative Maths chapter 1 test free?
Yes. The test, the answers and the explanations are free and need no sign-up. Sign in only if you want your scores kept across devices.
How is the chapter test marked?
The moment you press Finish: your score, the right answer and an explanation for every question, and the ones you got wrong saved in My mistakes to retry.
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Chapter 2: Quantitative · Percentages, ratio and commercial maths →All chaptersStuck? Ask a question