ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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

0.25 is ______

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

What is the conjugate of -7 -2i ?

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

i² =

• 1 A
• 2 B
• -1 C
• 0 D

Every prime number is also

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

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

For each real number, there is a number which is its

• Negative A
• Possitive B
• Opposite C
• Similar D

• N A
• r B
• 2r C
• π D

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

If P is a whole number greater than 1, which has only P and I are factors. Then P is called

• Wholw number A
• Prime number B
• Even number C
• Odd number D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

(a,0) x (c, 0) =

• (0,ac) A
• (ac, 0) B
• (0,0) C
• (a, c) D

• 
  A
• 
  B
• 
  C
• 
  D

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

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² D

• 
  A
• 
  B
• 
  C
• 
  D

i^-(4n+2) = -------------------------------

• 1 A
• i B
• -1 C
• -i D

The multiplicative inverse of (a,b) is

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  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 additive identity is

• 0 A
• 1 B
• -1 C
• None D

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

• One A
• Two B
• Three C
• Four D

The set of positive integers, 0 and negative integers is known as the set of

• Natural numbers A
• Rational numbers B
• All integers C
• Irrational numbers D

3/2 is

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

Every natural number is

• A prime number A
• An irrational number B
• An integer C
• An even number D

Gooch crucible is made of :

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

• 
  A
• 
  B
• 
  C
• 
  D

202.04 is an example of

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

a.a^-1 = a^-1.a = 1 is a

• Commutative law of multiplication A
• Multiplicative identity B
• Associative law of multiplication C
• Multiplicative inverse D

(a, b) + (-a, -b) =

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

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

• One A
• Two B
• Three C
• Four D