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

i is equal

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

• (a + b)c = ac + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b +c) = ab + ac D

Some of two real numbers is also a real number , this property is called:

• Commutative property w.r.t addition A
• Closure property w.r.t. addition B
• Associative property w.r.t. addition C
• Distributive property w.r.t addition D

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

(a+bi) - (c+di)=

• (a+b) = (c+d) A
• (a+c) + i(b+d) B
• (a - c) + (c- d)i C
• (a - c)+ (b - d)i D

√x = ______ if is a prime number

• Rational no A
• Natural no B
• Irrational no C
• Complex no D

The conjugate of √5 i is

• √5 A
• -√5 i B
• i C
• 5i 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 = -i C
• x = 2, y = 2 D

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

Every prime number is also

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

The property used in -3 <-2 ⇒0 <1

• Commutative property A
• Additive property of inequality B
• Additive inverse C
• Additive identity D

If a is any real number and a = a is called

• symmetric property A
• Trichotomy Properties B
• Transitive Property C
• Reflexive Properties D

The square root of 2i - 20i is

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

202.04 is an example of

• Recurring decimals A
• Non-recurring decimals B
• Terminating decimals C
• None of these D

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

If a set S contains n elements then P (S) has ........ number of elements

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² D

What is the conjugate of -7 -2i ?

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

∀x, y ∈ R, either x = y or x > y or x < y is

• Transitive property A
• Reflexive property B
• Trichotomy property C
• None of these D

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

In (x +iy) y is called as

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

2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called

• Associative property A
• Identity property B
• Commutative property C
• Closure property w.r.t multiplication D

In R the number of identity element w.r.t '+' is

• One A
• Two B
• Three C
• Four D

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

O is ______

• A positive integer A
• A negative integer B
• A natural number C
• An integer D

• x A
• 
  B
• y C
• 
  D

Rational number is a number which can be written as a terminating decimal fraction or a

• Non-terminating decimal fraction A
• Non-recurring B
• Recurring decimal fraction C
• a, b and c D

Every recurring decimal represents

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

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

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

Geometrically the modulus of a complex number represents its distance from the

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