ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

The order axioms are satisfied by set of

• C A
• C and R B
• R C
• None of these D

24 can be written as a product of

• Odd factors A
• Even factors B
• Whole factors C
• Prime factors D

• 1 A
• -i B
• i C
• 0 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

Associative law of multiplication

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

If Z₁= 1 + i, Z₂= 2+3i, then |Z₂- Z₁| = ?

• 
  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

• 0 A
• 1 B
• -1 C
• 2 D

0 (zero) is

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

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

∀x,y∈ R and x < 0, y < 0, which one is true 

• xy < o A
• xy = o B
• xy > o C
• None of these D

√-1 b=

• b A
• 2 B
• 2b C
• None of these D

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

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

A non-terminating non_recurring decimal represents an

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

O is ______

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

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

• One A
• Two B
• Three C
• Four D

Every real number is

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

Every whole number is

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

The set {0,-1} hold closure property under

• Addition A
• Both a & c B
• Multiplication C
• None of these D

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

• One A
• Two B
• Three C
• Four D

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

The set { 1 , -1} is closed w.r.t.

• Addition A
• Multiplications B
• Subtraction C
• None of these D

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

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

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² D

0.25 is ______

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

• Principle of equality of fractions A
• Rule for product of fraction B
• Rule for quotient of fraction C

Every irrational number is

• A real number A
• A prime number B
• A natural number C
• An integer D