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

The real number system contains.

• Positive Numbers A
• Negative numbers B
• Zero C
• (option a, b and c) 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

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

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

Q∪ Q' =

• Q A
• Q' B
• N C
• R 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

Every recurring decimal represents

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

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

O is ______

• A positive integer A
• A negative integer B
• A natural number C
• An integer D

Every irrational number is

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

• Set of whole number A
• Rational Numbers B
• Complex numbers C
• Whole numbers D

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

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

√2 is a number

• Rational A
• Irrational B
• Even C
• Odd 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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

The square roots of negative numbers is called

• Real no A
• Complex no B
• Positive no C
• Negative no D

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

Name the property used in 100 + 0 = 100

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

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

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

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D

If ∀a,b ε R,then a +b  ε  R is a property

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

• 
  A
• 
  B
• 
  C
• 
  D

6 is

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

√11 is

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