ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

• Principle of equality of Fractions A
• Rule for product of fraction B
• Golden rule of fraction C
• Rule of quotient of Fraction D

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

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

• 
  A
• 
  B
• 
  C
• 
  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

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 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

1/3 is a decimal

• Recurring A
• Terminating B
• Non-terminating C
• None of the above D

If a set S contains n elements then P (S) has ........ number of elements

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² D

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

Multiplicative inverse of "1" is

• 0 A
• ±1 B
• 1 C
• {0,1} 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

√2 is a number

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

0 (zero) is

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

Decimal part of irrational number is

• Terminating A
• Repeating only B
• Neither repeating nor terminating C
• Repeating and terminating D

The set {1, 2, 3, 4, ....} is called

• Set of Natural numbers A
• Set of whole numbers B
• Set of rational number C
• Set of irrational numbers D

4/√49 is a

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

• 
  A
• 
  B
• 
  C
• 
  D

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

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D

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

• 
  A
• 
  B
• 
  C
• 
  D

If z=(x,y) then z has no multiplicative inverse when

• x ≠ 0, y = 0 A
• x = 0, y = 0 B
• x = 0, y ≠ 0 C
• None of these D

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

• 
  A
• 
  B
• 
  C
• 
  D

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

3/4 is ______

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

The set {0,-1} hold closure property under

• Addition A
• Both a & c B
• Multiplication C
• None of these D