Number System - One Line Questions

1. Which of the following is a twin prime pair? — (5, 7)
2. Which of the following is a natural number? — 10
3. Which of the following is the smallest prime number? — 2
4. What is the value of 0! (zero factorial)? — 1
5. Which number is neither prime nor composite? — 1
6. Which of the following is the smallest natural number? — 1
7. What is the smallest composite number? — 4
8. Which number is the identity element for addition in the set of integers? — 0
9. Which of the following is an integer? — -10
10. Which of the following is a non-terminating, repeating decimal? — 1/3
11. Which of the following is a terminating decimal? — 1/4
12. What is the reciprocal of 5? — Both 1/5 and 0.2
13. Which of the following is a perfect square? — 16
14. Which of the following is an odd number? — 315
15. What is the smallest prime number greater than 100? — 101
16. Which of the following numbers is divisible by 3? — 9876
17. Which of the following is divisible by 5? — 5670
18. What is the value of 5! (5 factorial)? — 120
19. What is the product of the first three odd prime numbers? — 105
20. Which of the following is an even number? — 36
21. Which of the following is a composite number? — 4
22. What is the sum of the first five even natural numbers? — 30
23. What is the largest prime number less than 30? — 29
24. What is the multiplicative inverse of 3/4? — 4/3
25. What is the largest prime number less than 50? — 47
26. The sum of all natural numbers from 1 to 10 is: — 55
27. What is the additive inverse of -7? — 7
28. What is the number of integers between -5 and 5 (exclusive)? — 8
29. What is the largest two-digit prime number? — 97
30. Which number system uses 16 distinct symbols? — Hexadecimal
31. Which number system has only two digits, 0 and 1? — Binary
32. Which number system is commonly used in computers? — Binary
33. The number system with base 8 is called: — Octal
34. The sum of an even number and an odd number is always: — Odd
35. The number that can be expressed in the form p/q, where p and q are integers and q is not zero, is called a: — Rational number
36. The set of all integers is denoted by which symbol? — Z
37. The set of all rational numbers is denoted by which symbol? — Q
38. The sum of the first 'n' natural numbers is given by the formula: — n(n+1)/2
39. The number 0 is classified as: — Even number
40. The sum of two odd numbers is always: — Even
41. The sum of two prime numbers is always: — Even
42. The product of two prime numbers is always: — Composite
43. The set of all real numbers is denoted by which symbol? — R
44. The product of a non-zero rational number and an irrational number is always: — Irrational
45. The number that can be expressed as a fraction p/q where q = 0 is: — Undefined
46. The number pi (π) is an example of a: — Irrational number
47. The number that cannot be expressed in the form p/q is called a: — Irrational number
48. Which of the following is a property of prime numbers? — They have exactly two distinct positive divisors.
49. The set of all natural numbers is denoted by which symbol? — N
50. Which of the following is a rational number? — 22/7
All One Line Questions
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