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

∀x,y,z ∈ R and z 0,then

• x > y ⇒ xz > yz A
• x<y ⇒ xz < yz B
• x < y ⇒ xz > yz C
• None of these 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

• 
  A
• 
  B
• 
  C
• 
  D

QUQ, =

• N A
• R B
• W C
• Z D

• Associate law of addition A
• Commutative law of addition B
• Additive identity C
• Closure law of addition D

Every natural number is

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

The set of natural no. is closed under

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

3/4 is ______

• An odd number A
• An even number B
• A natural number C
• A rational number 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

• additive property A
• multiplicative property B
• additive identity C
• multiplicative identity D

• Principle of equality of Fractions A
• Rule for product of fraction B
• Golden rule of fraction C
• Rule of quotient of Fraction D

4/√49 is a

• Irrational Number A
• Prime Number B
• Rational number C
• Whole number D

0 (zero) is

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

• Additive property in R A
• Multiplication property in R B
• Cancellation property in R C
• Distribution property in R 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

1/3 is a decimal

• Recurring A
• Terminating B
• Non-terminating C
• None of the above D

• Symmetric property A
• Cancellation property w.r.t. multiplication B
• Reflexive property C
• Transitive property D

Which element is the additive inverse of (a,b) in Complex numbers

• (a,0) A
• (0,b) B
• (a,b) C
• (-a,-b) D

14 is not a

• Prime number A
• Whole number B
• Even number C
• Real number D

• -8 A
• 8 B
• 8i C
• 32 D

• Principle of equality of fractions A
• Rule for product of fraction B
• Rule for quotient of fraction C

• Multiplication property A
• Additive property B
• Trichotomy property C
• Transitive property of inequality 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

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

What is the conjugate of -7 -2i ?

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

∀x, y ∈ R, either x = y or x > y or x < y is

• Transitive property A
• Reflexive property B
• Trichotomy property C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

1.4142135... is ______

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

(a,0) x (c, 0) =

• (0,ac) A
• (ac, 0) B
• (0,0) C
• (a, c) D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D