ECAT Pre General Science MCQ Test With Answer for Mathematics Chapter 1

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The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 D

√x = ______ if is a prime number

• Rational no A
• Natural no B
• Irrational no C
• Complex no D

1/3 is ______

• A prime number A
• An integer B
• A rational number C
• An irrational number D

If z₁= 2 + 6i and z₂= 3 + 7i, then which expression defines the product of z₁and z₂?

• 36 + (-32)i A
• -36 + 32i B
• 6 + (-11)1 C
• 0, +(-12)i D

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  D

If z=(x,y) then z has no multiplicative inverse when

• x ≠ 0, y = 0 A
• x = 0, y = 0 B
• x = 0, y ≠ 0 C
• None of these D

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3.5+5.4=5.4+3.5 =8.9 this property of addition is called

• additive identity A
• assoclative property B
• commulative property C
• closure property D

Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8

• Associative property of addition A
• Associative property of multiplication B
• Additive identity C
• Multiplicative identity D

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

1.4142135... is ______

• A natural number A
• A rational number B
• A prime number C
• An irrational number D

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  B
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  C
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  D

If in a set of real no a is additive identity then

• a+a = 2a A
• a+a = 1 B
• a+a = 0 C
• None of these D

Every irrational number is

• A real number A
• A prime number B
• A natural number C
• An integer D

QUQ'

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  D

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24 can be written as a product of

• Odd factors A
• Even factors B
• Whole factors C
• Prime factors D

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 D

If a set S contains n elements then P (S) has ........ number of elements

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² D

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  B
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  D

Union of the sets of rational and irrational numbers is called 6th set of

• Natural numbers A
• Real numbers B
• Whole numbers C
• Prime numbers D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

i² = 

• 1 A
• 2 B
• -1 C
• 0 D

a >b, b >c ⇒a >c is a

• Multiplicative property A
• Additive property B
• Trichotomy property C
• Transitive property of inequality D

• Associative property of addition A
• Associative property of multiplication B
• Commutative property of addition C
• Commutative property of multiplication D

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

The solution set of the equation |3x + 2| = 5 is

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  A
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  B
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  C
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  D

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  A
• 1 B
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  C
• -1 D