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

In (x + iy), y is called as

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

6 is

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

0 (zero) is

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

O is ______

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

• real number A
• complex number B
• rational number C
• irrational number D

∀x,y∈ R and x < 0, y < 0, which one is true 

• xy < o A
• xy = o B
• xy > o C
• None of these D

Geometrically the modulus of a complex number represents its distance from the

• Point (1,0) A
• Point (0,1) B
• Point (1,1) C
• Point (0,0) D

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

∀ a ε R ∃ o ε R such that a + v = 0 + a = a is property of

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

(a-1)-1 =

• a-1 A
• a B
• -a C
• None of above D

• (x, y) A
• (kx, y) B
• (x, ky) C
• (kx, ky) D

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

If Z = (1,2), then Z^-1= ?

• (0.2, 0.4) A
• (-0.2, 0.4) B
• (0.2, -0.4) C
• (-0.2, -0.4) D

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

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

In R the number of identity elements w.r.t.'.' is

• One A
• Two B
• Three C
• Four D

If 0 = R, thenthe additive inverse of a is

• 1/9 A
• ^1/-9 B
• a C
• -a D

(a,b) +(-a,-b) =

• (0,0) A
• (a,b) B
• (-a,-b) C
• (1,1) D

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

• z is purely imaginary A
• a is any complex number B
• z is real C
• None of these D

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

I is not

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

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

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

√x = ______ if is a prime number

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

The identity element with respect to subtraction is

• 0 A
• -1 B
• 0 and 1 C
• None of thes D

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

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

• 
  A
• 
  B
• 
  C
• 
  D

The order axioms are satisfied by set of

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