ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

• real number A
• complex number B
• rational number C
• irrational number D

• z is purely imaginary A
• a is any complex number B
• z is real C
• None of these D

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

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

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

The solution set of the equation |3x + 2| = 5 is

• 
  A
• 
  B
• 
  C
• 
  D

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

The value of x and y when (x + iy)2 = 5 - 4i

• x = 2, y = -1 A
• x = -2, y = 1 B
• x = 2, y = -i C
• x = 2, y = 2 D

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

• 
  A
• 
  B
• 
  C
• 
  D

Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8

• Associative property of addition A
• Associative property of multiplication B
• Additive identity C
• Multiplicative identity D

√11 is

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

24 can be written as a product of

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

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

If z₁ = 1 + 2i, z₂ = 3 + 4i then

• z₁ > z₂ A
• z₁ = z₂ B
• z₁ < z₂ C
• None of these D

There is no element common in

• N and W A
• E and W B
• N and O C
• Q and Q' D

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

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

6 is

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

Name the property used in 100 + 0 = 100

• Additive inverse A
• Multiplicative inverse B
• Additive identity C
• Multiplicative identity D

3.5+5.4=5.4+3.5 =8.9 this property of addition is called

• additive identity A
• assoclative property B
• commulative property C
• closure property D

a >b, b >c ⇒a >c is a

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

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

The square root of every incomplete square is an

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

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

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

√25 is a number

• Rational A
• Irrational B
• Natural C
• Odd 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

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-1)-1 =

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

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

∀ z ∈ C, multipliucative is

• (1,1) A
• (1,0) B
• (0,1) C
• None of these D