ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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

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

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b 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

There is no element common in

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

• Associative law of multiplication A
• Commutative law of addition B
• Commutative law of multiplication C
• Associative law of addition D

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

• Set of whole number A
• Rational Numbers B
• Complex numbers C
• Whole numbers D

√23 is

• A rational number A
• A irrational number B
• An even integer C
• A factor of 36 D

(√3+√5)+√7 = √3 +(√5 +√7) property used in above is

• Commutative property of addition A
• Closure property of addition B
• Additive inverse C
• Associative property w.r.t to adition D

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

The square root of 2i - 20i is

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

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

The square roots of negative numbers is called

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

6 is

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

• (a + b)c = a . c + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b+ c) = ab + ac D

• 
  A
• 1 B
• -1 C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

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

• 
  A
• 
  B
• 
  C
• 
  D

i¹⁰¹ =

• i A
• i² B
• -i C
• -1 D

• Associative property of addition A
• Commutative property of addition B
• Distributive property C
• Additive identity D

• Closure law of addition A
• Associative law of addition B
• Commutative law of multiplication C
• Associative law of multiplication D

• 
  A
• 
  B
• 
  C
• 
  D

(a-1)-1 =

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

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D