ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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

Total number of subsets that can be formed out of the set {a,b,c} is

• 1 A
• 4 B
• 8 C
• 12 D

A subset of set of complex number whose elements are of the form (a,0) is called

• Real number A
• Complex number B
• Rational number C
• Irrational number D

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

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D

The identity element with respect to subtraction is

• 0 A
• -1 B
• 0 and 1 C
• None of thes D

i¹⁰¹ =

• i A
• i² B
• -i C
• -1 D

If ∀a,b ε R,then a +b  ε  R is a property

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

(a-1)-1 =

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

• -8 A
• 8 B
• 8i C
• 32 D

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

0.25 is ______

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

• 
  A
• 
  B
• 
  C
• 
  D

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

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

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

• 
  A
• 
  B
• 
  C
• 
  D

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D

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

• One A
• Two B
• Three C
• Four D

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

π is ______

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

Which element is the additive inverse of (a,b) in Complex numbers

• (a,0) A
• (0,b) B
• (a,b) C
• (-a,-b) D

The set {1,2,3,4......} is called

• Set of natural numbers A
• Set of whole numbers B
• Set of rational number C
• Set of irrational numbers D

Every recurring decimal represents

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

202.04 is an example of

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

The multiplicative inverse of (a,b) is

• 
  A
• 
  B
• 
  C
• 
  D

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

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

Every whole number is

• A real number A
• An irrational number B
• A prime number C
• A negative integer D

Gooch crucible is made of :

• Brass. A
• Porcelain. B
• Bronze. C
• Gold. D