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

The additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 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

• 
  A
• 
  B
• 
  C
• 
  D

√x = ______ if is a prime number

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

• 
  A
• 
  B
• 
  C
• 
  D

I is not

• Real number A
• Natural number B
• Prime Number C
• Whole Number D

a >b, b >c ⇒a >c is a

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

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

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

• 
  A
• 
  B
• 
  C
• 
  D

i¹⁰¹ =

• i A
• i² B
• -i C
• -1 D

The value of x, and y, when (x + iy)²= 5 + 4i

• X = 2, y = 1 A
• X = -2, y = 1 B
• X = 2, y = -1 C
• X = 2, y = 2 D

Every real number is

• a positive integer A
• a rational number B
• a negative integer C
• a complex number D

i³ =

• -1 A
• i B
• -i C
• 1 D

The square roots of negative numbers is called

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

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

• 
  A
• 
  B
• 
  C
• 
  D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

3/2 is

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

If z = (x,y) , then  z ̅  =

• (-x,y) A
• (x,-y) B
• (-x, -y) C
• None of these D

√11 is

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

• 
  A
• 
  B
• 
  C
• 
  D

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

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

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

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

A non-terminating, non-recurring decimal represent

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

The order axioms are satisfied by set of

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

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

√2 is a number

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