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

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

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

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

The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 D

3/4 is ______

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

i is equal

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

(a-1)-1 =

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

What is the conjugate of -7 -2i ?

• -7 + 2i A
• 7 +2i B
• 7 -2i C
• √53 D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

0.25 is ______

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

• (x, y) A
• (kx, y) B
• (x, ky) C
• (kx, ky) D

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

What is the conjugate of -7 -2i?

• -7 + 2i A
• 7 + 2i B
• 7 -2i C
• None of these D

• real part of z A
• imaginary part of z B
• conjugate of z C
• modulus of z D

a >b, b >c ⇒a >c is a

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

In polar form of complex number r =

• 
  A
• 
  B
• 
  C
• 
  D

1/3 is a decimal

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

The square root of 2i - 20i is

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

The√ is used for the

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

Every recurring decimal represents

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

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist 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 equation |x + 4| = x has solution

• x = -2 A
• x = 2 B
• x = -4 C
• x = 4 D

• 
  A
• 
  B
• 
  C
• 
  D

• -8 A
• 8 B
• 8i C
• 32 D

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

• 
  A
• 
  B
• 
  C
• 
  D