ECAT Pre General Science MCQ Test With Answer for Mathematics chapter 1 (Number System)

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Sr.#	Question	Answer
1		A. (a + b)c = a . c + bc B. a + b = b + a C. (a + b) + c = a + (b + c) D. a(b+ c) = ab + ac
2		A. Associative law of addition B. Commutative law of addition C. Additive identity D. Closure law of addition
3	The√ is used for the	A. Positive square root B. Negative square root C. +ve and -ve square root D. Whole number
4	The square root of 2i - 20i is	A. ±(5 - 2i) B. ±(5+ 2i) C. (5 - 2i) D. None of these
5		A. B. C. D.
6	i³=	A. -1 B. i C. -i D. 1
7	The order axioms are satisfied by set of	A. C B. C and R C. R D. None of these
8	6 is	A. A prime integer B. An irrational number C. A rational number D. An odd integer
9	The set {1,2,3,4......} is called	A. Set of natural numbers B. Set of whole numbers C. Set of rational number D. Set of irrational numbers
10	Which of the following has the same value as i¹¹³?	A. i B. -1 C. -i D. 1
11	A subset of set of complex number whose elements are of the form (a,0) is called	A. Real number B. Complex number C. Rational number D. Irrational number
12	The square root of every incomplete square is an	A. Rational numbers B. Even numbers C. odd numbers D. Irrational numbers
13	The additive inverse of 0 is	A. 1 B. -1 C. 0 D. Does not exist
14	a.a^-1= a^-1.a = 1 is a	A. Commutative law of multiplication B. Multiplication identity C. Associative law of multiplication D. Multiplication inverse
15	In (x + iy), y is called as	A. Imaginary part B. Complex number C. Real part D. None of above
16		A. A complex number B. A rational number C. A natural number D. An irrational number
17		A. B. C. D.
18	i⁹ =	A. i² B. -1 C. 1 D. i
19		A. B. C. D.
20	If Z = (1,2), then Z^-1 =?	A. (0.2, 0.4) B. (-0.2 ,0.4) C. (0.2,-0.4) D. (-0.2,-0.4)
21	(a,0) x (c,0) =	A. (0,ac) B. (ac,0) C. (0,0) D. (a,c)
22	∀x,y,z ∈ R and z 0,then	A. x > y ⇒ xz > yz B. x<y ⇒ xz < yz C. x < y ⇒ xz > yz D. None of these
23	If Z₁= 1 + i, Z₂= 2+3i, then \|Z₁- Z₂\| = ?	A. B. C. D.
24		A. Reflexive property B. Symmetric property C. Cancellations property w.r.t. addition D. Transitive property
25	24 can be written as a product of	A. Odd factors B. Even factors C. Whole factors D. Prime factors
26	0.25 is ______	A. An irrational number B. A natural number C. A prime number D. A rational number
27	i =	A. B. C. D.
28	The square root of 2i - 20i is	A. +-(5 - 2i) B. +-(5 + 2i) C. (5 - 2i) D. None of these
29		A. Principle of equality of fractions B. Rule for product of fraction C. Rule for quotient of fraction
30	The real number system contains.	A. Positive Numbers B. Negative numbers C. Zero D. (option a, b and c)