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

√23 is

• A rational number A
• A irrational number B
• An even integer C
• A factor of 36 D

• Additive property in R A
• Multiplication property in R B
• Cancellation property in R C
• Distribution property in R 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 additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 D

Which of the following sets has closure property w.r.t. addition

• { 0 } A
• { 1 } B
• { 0, -1} C
• { 1, -1} D

1/3 is ______

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

In polar form of complex number r =

• 
  A
• 
  B
• 
  C
• 
  D

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

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

The equation |x +4| = x has solution

• x = -2 A
• x = 2 B
• x = -4 C
• x = 4 D

Name the property used in 1000 x 1 = 1000

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

The order axioms are satisfied by set of

• C A
• C and R B
• R C
• None of these D

The set { 1 , -1} is closed w.r.t.

• Addition A
• Multiplications B
• Subtraction C
• None of these D

6 is

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

The conjugate of √5 i is

• √5 A
• -√5 i B
• i C
• 5i 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

• 0 A
• 1 B
• -1 C
• 2 D

For each real number, there is a number which is its

• Negative A
• Possitive B
• Opposite C
• Similar 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

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

0 (zero) is

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

√11 is

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

• 
  A
• 
  B
• 
  C
• 
  D

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

• 
  A
• 
  B
• 
  C
• 
  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

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

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

• 
  A
• 
  B
• 
  C
• 
  D
• 
  E

What is the conjugate of -6 -i

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

√x = ______ if is a prime number

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