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

√11 is

• an irrational number A
• Rational number B
• odd number C
• Negative number D

• real part of z A
• imaginary part of z B
• conjugate of z C
• modulus of z D

The set of natural no. is closed under

• multiplication A
• subtraction B
• difference C
• division D

• (a + b)c = ac + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b +c) = ab + ac D

The multiplicative inverse of 4 is

• -4 A
• -1/4 B
• 1/4 C
• 1 D

Every prime number is also

• Rational number A
• Even number B
• Irrational number C
• Multiple of two numbers D

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

Name the property used in 100 + 0 = 100

• Additive inverse A
• Multiplicative inverse B
• Additive identity C
• Multiplicative identity D

In (x + iy), y is called as

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

• 15 A
• 15 i B
• -15 i C
• -15 D

• Reflexive property A
• Symmetric property B
• Transitive property C
• Additive property 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

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  A
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  B
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  C
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  D

Rational number is a number which can be written as a terminating decimal fraction or a

• Non-terminating decimal fraction A
• Non-recurring B
• Recurring decimal fraction C
• a, b and c D

• Principle of equality of fractions A
• Rule for product of fractions B
• Golden rule of fractions C
• Rule for quotient of fractions D

Every whole number is

• A real number A
• An irrational number B
• A prime number C
• A negative integer D

Associative law of multiplication

• ab - ba A
• a(bc) = (ab) c B
• a(b + c) = ab +ac C
• (a +b)c = ac + bc D

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

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

What is the conjugate of -7 -2i ?

• -7 + 2i A
• 7 +2i B
• 7 -2i C
• √53 D

• are real no A
• both are not real B
• are imaginary no C
• both are imaginary D

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  C
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  D

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  A
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  B
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  C
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  D

In set builder notation the set {0,1,2,........100} can be written as

• {x / xε B ∧ x ≤ 100} A
• {x / x ∈ W ∧ x < 101} B
• {x / x ∈ Z ∧ x < 101} C
• The set of first 100 whole numbers D

The sum of complex number (a,b) and (c,d) is

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  A
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  B
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  C
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  D

The set {1,2,3,4......} is called

• Set of natural numbers A
• Set of whole numbers B
• Set of rational number C
• Set of irrational numbers D

What is the conjugate of -6 -i

• -6 +i A
• 6 + i B
• -6 -i C
• 6 -i D

In R the right 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

If z₁ =√-36 ,z₂ =√-25,z3 =√-16 then

• 15 A
• 15i B
• -15i C
• -15 D

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  A
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  B
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  C
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  D