ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

• Associative law of multiplication A
• Commutative law of addition B
• Commutative law of multiplication C
• Associative law of addition D

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

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

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

• One A
• Two B
• Three C
• Four D

a >b ⇒a +c >b +c is known as

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

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

• 
  A
• 
  B
• 
  C
• 
  D

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

The square roots of negative numbers is called

• Real no A
• Complex no B
• Positive no C
• Negative no D

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

1/3 is ______

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

6 is

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

√11 is

• an irrational number A
• Rational number B
• odd number C
• Negative number D

If a > b or a < b than a = b is a

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

• 
  A
• 
  B
• 
  C
• 
  D

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

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

• (x, y) A
• (kx, y) B
• (x, ky) C
• (kx, ky) D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

• 
  A
• 
  B
• 
  C
• 
  D

Zero is

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

The set of natural no. is closed under

• multiplication A
• subtraction B
• difference C
• division D

(7, 9) + (3, -5) =

• (4, 4) A
• (10, 4) B
• (9, -5) C
• (7, 3) D

Every prime number is also

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

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

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

• 
  A
• 
  B
• 
  C
• 
  D

In R the right cancellation property w.r.t. addition is

• 
  A
• 
  B
• 
  C
• 
  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

• 0 A
• 1 B
• -1 C
• 2 D

• Set of whole number A
• Rational Numbers B
• Complex numbers C
• Whole numbers 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

• Closure law of addition A
• Closure law of multiplication B
• Commutative law of addition C
• Commutative law of multiplication D