ECAT Pre General Science Mathematics Chapter 1 Number System Online Test With Answers

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ECAT Pre General Science Mathematics Chapter 1 Number System Online Test

Sr. # Questions Answers Choice
1 15 15 i -15 i -15
2 If Z1= 1 + i, Z2= 2+3i, then |Z2- Z1| = ?
3 If Z = (1,2), then Z-1= ? (0.2, 0.4) (-0.2, 0.4) (0.2, -0.4) (-0.2, -0.4)
4 The value of x, and y, when (x + iy)2= 5 + 4i X = 2, y = -1 X = -2, y=1 X = 2, y = -1 X = 2, y = 2
5 A positive integer A negative integer A natural number An irrational number
6 Every prime number is also Rational number Even number Irrational number Multiple of two numbers
7 3/2 is An irrational number Whole number A positive integer A rational number
8 A rational number A irrational number An even integer A factor of 36
9 6 is A prime integer An irrational number A rational number An odd integer
10 Zero is An irrational number A rational number A negative integer A positive number
11
12
13 The multiplicative inverse of (a,b) is
14 (x, y) (kx, y) (x, ky) (kx, ky)
15
16 x y
17 Every real number is a positive integer a rational number a negative integer a complex number
18
19 The product of complex numbers (a,b) and (c,d) is (ac, bd) (ac-bd, ad+bc) (ab,cd) (ac+bd,ad-bc)
20 The sum of complex number (a,b) and (c,d) is
21 1 -1
22 1 -1
23 real part of z imaginary part of z conjugate of z modulus of z
24
25 0 1 -1 2
26 real number complex number rational number irrational number
27 additive property multiplicative property additive inverse additive identity
28 additive property multiplicative property additive identity multiplicative identity
29 Name the property used in a (b-c) = ab - ac commutative property of multiplication distributive property of multiplication associative property of multiplication multiplicative inverse
30 Name the property used in 1000 x 1 = 1000 additive inverse multiplicative inverse additive identity multiplicative identity
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