ECAT Pre General Science MCQ Test With Answer for Mathematics Chapter 1

• -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

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

In (x +iy) y is called as

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

6 is

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

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

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

• 
  A
• 
  B
• 
  C
• 
  D

∀a,b,c∈R and c>0,then

• a>b ⇒ ac < bc A
• a>b ⇒ ac > bc B
• a<b ⇒ ac > bc C
• None of these D

Name the property used in a (b-c) = ab - ac

• commutative property of multiplication A
• distributive property of multiplication B
• associative property of multiplication C
• multiplicative inverse D

• N A
• r B
• 2r C
• π D

If 0 = R, thenthe additive inverse of a is

• 1/9 A
• ^1/-9 B
• a C
• -a D

A non-terminating, non-recurring decimal represent

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

∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is

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

• 
  A
• 
  B
• 
  C
• 
  D

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

• √5 A
• √7 B
• -1-2i C
• √3 D

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

• √3 i A
• √7 B
• -2-i C
• √5 D

I is not

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

Every natural number is

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

The√ is used for the

• Positive square root A
• Negative square root B
• +ve and -ve square root C
• Whole number D

• -8 A
• 8 B
• 8i C
• 32 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

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

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

Name the property used in 4.1 + (-4.1) = 0

• Additive inverse A
• Multiplication inverse B
• Additive identity C
• Multiplication identity D

(a-1)-1 =

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

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D

• 
  A
• 
  B
• 
  C

1.4142135... is ______

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

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

If P is a whole number greater than 1, which has only P and I are factors. Then P is called

• Wholw number A
• Prime number B
• Even number C
• Odd number D