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

• 0 A
• 1 B
• -1 C
• 2 D

• 
  A
• 
  B
• 
  C
• 
  D

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

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

∀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

√23 is

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

The square roots of negative numbers is called

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

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

Every real number is

• a positive integer A
• a rational number B
• a negative integer C
• a complex number 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 conjugate of √5 i is

• √5 A
• -√5 i B
• i C
• 5i 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 prime number can be a factor of a square only if it occurs in the square at least

• Once A
• Thirce B
• Twice C
• None of these D

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

Every prime number is also

• Rational number A
• Even number B
• Irrational number C
• Multiple of two numbers D

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

∀x,y∈ R and x < 0, y < 0, which one is true 

• xy < o A
• xy = o B
• xy > o C
• None of these D

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

The square root of 2i - 20i is

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

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

• 
  A
• 
  B
• 
  C
• 
  D

• 1 A
• -i B
• i C
• 0 D

What is the conjugate of -6 -i

• -6 +i A
• 6 + i B
• -6 -i C
• 6 -i D

QUQ, =

• N A
• R B
• W C
• Z D

6 is

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

In R the left cancellation property w.r.t addition is

• 
  A
• 
  B
• 
  C
• 
  D

i is equal

• (1 , 0) A
• (0 , 1) B
• (1 , 1) C
• (0 , 0) D

• 
  A
• 
  B
• 
  C
• 
  D

The sum of complex number (a,b) and (c,d) is

• 
  A
• 
  B
• 
  C
• 
  D