ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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

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

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

• One A
• Two B
• Three C
• Four D

i¹⁰¹ =

• i A
• i² B
• -i C
• -1 D

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

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

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

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

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

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

• One A
• Two B
• Three C
• Four D

• 15 A
• 15 i B
• -15 i C
• -15 D

The conjugate of √5 i is

• √5 A
• -√5 i B
• i C
• 5i D

• N A
• r B
• 2r C
• π D

3.5+5.4=5.4+3.5 =8.9 this property of addition is called

• additive identity A
• assoclative property B
• commulative property C
• closure property D

• 1 A
• -i B
• i C
• 0 D

I is not

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

6 is

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

If ∀a,b ε R,then a +b  ε  R is a property

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

The product of complex numbers (a,b) and (c,d) is

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

i² =

• 1 A
• 2 B
• -1 C
• 0 D

Every whole number is

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

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

• 
  A
• 
  B
• 
  C
• 
  D

• Additive property of inequality A
• Commutative property B
• Additive inverse C
• Additive identity D

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

The multiplicative inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 1 D

• 
  A
• 
  B
• 
  C

√11 is

• an irrational number A
• Rational number B
• odd number C
• Negative number D

∀x,y,z ∈ R and z 0,then

• x > y ⇒ xz > yz A
• x<y ⇒ xz < yz B
• x < y ⇒ xz > yz C
• None of these D