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

The square root of 2i - 20i is

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

√2 is a number

• Rational A
• Irrational B
• Even C
• Odd D

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

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

The√ is used for the

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

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

a >b, b >c ⇒a >c is a

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

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

π is the ration of

• Area of a circle to its diameter A
• Area of a circle to its radius B
• Circumference of a circle to its diameter C
• Circumference of circle to its radius D

• 
  A
• 
  B
• 
  C

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

The additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 D

If 0 = R, thenthe additive inverse of a is

• 1/9 A
• ^1/-9 B
• a C
• -a D

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 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

There is no element common in

• N and W A
• E and W B
• N and O C
• Q and Q' D

Such fraction which can not be written in the form ofp⁄q where p,q and q≠ 0,such fractions are called.

• Fractinal numbers A
• Rational Numbers B
• Even Numbers C
• Whole Numbers D

The value of x, and y, when (x + iy)²= 5 + 4i

• X = 2, y = -1 A
• X = -2, y=1 B
• X = 2, y = -1 C
• X = 2, y = 2 D

Zero is

• An irrational number A
• A rational number B
• A negative integer C
• A positive number D

i =

• √1 A
• √2 B
• √-2 C
• √-1 D

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

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

Every real number is

• a positive integer A
• a rational number B
• a negative integer C
• a complex number D

i³ =

• -1 A
• i B
• -i C
• 1 D

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

√11 is

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

• 
  A
• 1 B
• -1 C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

∀ z ∈ C, multipliucative is

• (1,1) A
• (1,0) B
• (0,1) C
• None of these D