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

• are real no A
• both are not real B
• are imaginary no C
• both are imaginary D

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

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

The decimal fraction in which we have finite number of digits in its decimal part is called.

• recurring decimal fraction A
• Non terminating faction B
• Non recurring fraction C
• terminating decimal fraction 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

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

1/3 is ______

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

• 
  A
• 
  B
• 
  C
• 
  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

(a-1)-1 =

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

1/3 is a decimal

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

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b D

• 
  A
• 
  B
• 
  C
• 
  D

If a > b or a < b than a = b is a

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

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

• √5 A
• √7 B
• -1-2i C
• √3 D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

3/4 is ______

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

i¹⁰¹ =

• i A
• i² B
• -i C
• -1 D

• 15 A
• 15 i B
• -15 i C
• -15 D

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

∀x,y∈R and x> 0 , y>0, if x > y

• 
  A
• 
  B
• 
  C
• None of these D

• 0 A
• 1 B
• -1 C
• 2 D

• 
  A
• 
  B
• 
  C
• 
  D

• 15 A
• 15 i B
• -15 i C
• -15 D

• -3 -2i A
• 3 +2i B
• 1 + 2i C
• 1 - 2i D

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

If Z = (1,2), then Z^-1 =?

• (0.2, 0.4) A
• (-0.2 ,0.4) B
• (0.2,-0.4) C
• (-0.2,-0.4) D

a >b ⇒a +c >b +c is known as

• Trichotomy property A
• Additive property of inequality B
• Transitive property C
• Multiplicative property D