ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a 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

QUQ, =

• N A
• R B
• W C
• Z D

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D

i⁹ =

• i² A
• -1 B
• 1 C
• i D

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist 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

2.333....is a

• Irrational no A
• Complex no B
• Rational no C
• None of these D

• a = a A
• a < a B
• a > a C
• a²= a D

A non-terminating non_recurring decimal represents an

• Irrational no A
• Both a & c B
• Rational no C
• None of these D

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

Every real number is

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

If a and b are real numbers then a+b is also real number this law is called

• associative law of addition A
• closure law of addition B
• Distributive law of addition C
• Commutative law of addition D

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

• One A
• Two B
• Three C
• Four D

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

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

In (x + iy) x is the known as

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

• 
  A
• 
  B
• 
  C
• 
  D

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

• 
  A
• 
  B
• 
  C
• 
  D

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

The square root of every incomplete square is an

• Rational numbers A
• Even numbers B
• odd numbers C
• Irrational numbers D

• Associate law of addition A
• Commutative law of addition B
• Additive identity C
• Closure law of addition 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

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

If z = (x,y) , then  z ̅  =

• (-x,y) A
• (x,-y) B
• (-x, -y) 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

• are real no A
• both are not real B
• are imaginary no C
• both are imaginary D