ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

• 1 A
• -i B
• i C
• 0 D

• 
  A
• 
  B
• 
  C
• 
  D

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

If a and b are real numbers then a+b is also real number this law is called

• associative law of addition A
• closure law of addition B
• Distributive law of addition C
• Commutative law of addition D

A subset of set of complex number whose elements are of the form (a,0) is called

• Real number A
• Complex number B
• Rational number C
• Irrational number D

A non-terminating, non-recurring decimal represent

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

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

• -8 A
• 8 B
• 8i C
• 32 D

Total number of subsets that can be formed out of the set {a,b,c} is

• 1 A
• 4 B
• 8 C
• 12 D

If a is any real number and a = a is called

• symmetric property A
• Trichotomy Properties B
• Transitive Property C
• Reflexive Properties D

The square root of 2i - 20i is

• +-(5 - 2i) A
• +-(5 + 2i) B
• (5 - 2i) C
• None of these D

∀a,b, c ε R ac = bc ⇒ a = b, c ≠ 0 is a

• Symmetric property A
• Cancellation property w.r.t multiplication B
• Reflexive property C
• Transitive property D

I is not

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

a.a^-1 = a^-1.a = 1 is a

• Commutative law of multiplication A
• Multiplicative identity B
• Associative law of multiplication C
• Multiplicative inverse D

There is no element common in

• N and W A
• E and W B
• N and O C
• Q and Q' D

• Principle of equality of fractions A
• Rule for product of fraction B
• Rule for quotient of fraction C

i¹⁰¹ =

• i A
• i² B
• -i C
• -1 D

• Reflexive property A
• Symmetric property B
• Cancellations property w.r.t. addition C
• Transitive property 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

Q∪ Q' =

• Q A
• Q' B
• N C
• R 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

In (x + iy) x is the known as

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

6 is

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

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

3/4 is ______

• An odd number A
• An even number B
• A natural number C
• A rational number D

0.25 is ______

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

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

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

4/√49 is a

• Irrational Number A
• Prime Number B
• Rational number C
• Whole number D

• 
  A
• 
  B
• 
  C
• 
  D