Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test With Answers

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Mathematics ECAT Pre Engineering Chapter 1 Number System Online Test

Sr. # Questions Answers Choice
1 (a-1)-1= a<sup>-1</sup> a -a None of above
2 Trichotomy property Additive property of inequality Transitive property Multiplicative property
3 Multiplication property Additive property Trichotomy property Transitive property of inequality
4 If 4 > b or a < b than a = b is a Additive property Transitive property Trichotomy property of inequality None of above
5 Symmetric property Cancellation property w.r.t. multiplication Reflexive property Transitive property
6 Reflexive property Symmetric property Cancellations property w.r.t. addition Transitive property
7 Commutative law of multiplication Closure law of multiplication Associative law of multiplication Multiplication identity
8 a.a-1= a-1.a = 1 is a Commutative law of multiplication Multiplication identity Associative law of multiplication Multiplication inverse
9 Associative law of multiplication ab = ba a(bc) = (ab) c a(b+c) = ab + ac (a + b)c = ac + bc
10 Commutative law of addition Associative law of addition Additive identity Additive inverse
11 Closure law of addition Associative law of addition Additive inverse Additive identity
12 N r 2r <span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>π</i></span>
13 1/3 is a decimal Recurring Terminating Non-terminating None of the above
14 202.04 is an example of Recurring decimals Non-recurring decimals Terminating decimals None of above
15 Rational Irrational Even Odd
16 Rational Irrational Natural Odd
17 The symbol of irrational is W N Q Q'
18 QUQ'
19 Set of whole number Rational Numbers Complex numbers Whole numbers
20 The set {1, 2, 3, 4, ....} is called Set of Natural numbers Set of whole numbers Set of rational number Set of irrational numbers
21 Geometrically, the modulus of a complex number represents its distance from the Point (1, 0) Point (0, 1) Point (1, 1) Point (0, 0)
22
23 The multiplicative inverse of 1 - 2i is
24 The square root of 2i - 20i is +-(5 - 2i) +-(5 + 2i) (5 - 2i) None of these
25 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
26 -3 -2i 3 +2i 1 + 2i 1 - 2i
27 What is the conjugate of -7 -2i? -7 + 2i 7 + 2i 7 -2i None of these
28
29 The equation |x + 4| = x has solution x = -2 x = 2 x = -4 x = 4
30 The solution set of the equation |3x + 2| = 5 is
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