ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

Every whole number is

• A real number A
• An irrational number B
• A prime number C
• A negative integer D

Some of two real numbers is also a real number , this property is called:

• Commutative property w.r.t addition A
• Closure property w.r.t. addition B
• Associative property w.r.t. addition C
• Distributive property w.r.t addition D

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

i =

• 
  A
• 
  B
• 
  C
• 
  D

6 is

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

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

• a = a A
• a < a B
• a > a C
• a²= a D

• 
  A
• 
  B
• 
  C
• 
  D

0.25 is ______

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

The equation |x +4| = x has solution

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

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

The order axioms are satisfied by set of

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

if Z1 = 1+i, Z2= 2+3i, then |Z2 -Z1| =

• √3 i A
• √7 B
• -2-i C
• √5 D

(a^-1)^-1=

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

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

1/3 is ______

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

I is not

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

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

2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called

• Associative property A
• Identity property B
• Commutative property C
• Closure property w.r.t multiplication D

π is the ration of

• Area of a circle to its diameter A
• Area of a circle to its radius B
• Circumference of a circle to its diameter C
• Circumference of circle to its radius D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D

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

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

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

If z₁ = (a,b), z₂=(c,d), then z₁ z₂ = -------------------

• (ac,bd) A
• (ac+bd, ad-bc) B
• (ac-bd , ad+bc) C
• (ac-bd , ad-bc) 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

• 0 A
• 1 B
• -1 C
• None of these D

0 (zero) is

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