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ECAT - Practice Test - Maths - Number Systems and Sets Quiz

Attempt 10 MCQs on ECAT - Practice Test - Maths - Number Systems and Sets | Quiz 5

41. Which is the smallest prime number?



42. The set of all even numbers is a subset of:



43. What is the modulus of a real number -3?



44. If f(x) = x + 2, then f(3) = ?



45. The set of all complex numbers is denoted by:



46. For two sets A and B, if A ∪ B = A, then which is true?



47. The product of (1 + i) and (1 - i) is:



48. Let f: R → R be defined by f(x) = x³ - x. Which of the following is true?



49. Which of the following sets is uncountable?



50. Using mathematical induction, for n ≥ 1, the sum of first n odd numbers is n². To prove the induction step, we assume the statement for k and prove for k+1. What is the expression for the (k+1)-th odd number?



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