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

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  A
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  B
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  C
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  D

The additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 D

(7, 9) + (3, -5) =

• (4, 4) A
• (10, 4) B
• (9, -5) C
• (7, 3) D

• Closure law of addition A
• Associative law of addition B
• Commutative law of multiplication C
• Associative law of multiplication D

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  A
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  B
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  C
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  D

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

(a^-1)^-1=

• a^-1 A
• a B
• -a C
• None of above D

Any whole number can be written as a product of factors which are

• Odd numbers A
• Prime number B
• Rational number C
• Even number D

Name the property used in a (b-c) = ab - ac

• commutative property of multiplication A
• distributive property of multiplication B
• associative property of multiplication C
• multiplicative inverse D

• Commutative law of addition A
• Associative law of addition B
• Additive identity C
• Additive inverse D

a.a^-1= a^-1.a = 1 is a

• Commutative law of multiplication A
• Multiplication identity B
• Associative law of multiplication C
• Multiplication inverse D

In R the left cancellation property w.r.t addition is

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  A
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  B
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  C
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  D

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

For any real numbers x,y,xy=o ⇒

• x ≠ 0 ∧ y ≠ 0 A
• x = 0 ∨ y = 0 B
• x = 0 C
• y = 0 D

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  A
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  B
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  C
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  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

Every recurring decimal represents

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

√2 is a number

• Rational A
• Irrational B
• Even C
• Odd D

• Additive property of inequality A
• Commutative property B
• Additive inverse C
• Additive identity D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D

In (x + iy), y is called as

• Imaginary part A
• Complex number B
• Real part C
• None of above D

The square root of 2i - 20i is

• ±(5 - 2i) A
• ±(5+ 2i) B
• (5 - 2i) C
• None of these D

If 4 > b or a < b than a = b is a

• Additive property A
• Transitive property B
• Trichotomy property of inequality C
• None of above D

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

A prime number can be a factor of a square only if it occurs in the square at least

• Once A
• Thirce B
• Twice C
• None of these D

3/2 is

• An irrational number A
• Whole number B
• A positive integer C
• A rational number D

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

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² D

The√ is used for the

• Positive square root A
• Negative square root B
• +ve and -ve square root C
• Whole number D

• (x, y) A
• (kx, y) B
• (x, ky) C
• (kx, ky) D

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  A
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  B
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  C
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  D