ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

4/√49 is a

• Irrational Number A
• Prime Number B
• Rational number C
• Whole number D

• real part of z A
• imaginary part of z B
• conjugate of z C
• modulus of z D

24 can be written as a product of

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

i² =

• 1 A
• 2 B
• -1 C
• 0 D

√2 +√3 +√5) = (√2 +√3 +√5: this property is called

• associative property w.r.t addition A
• commutative property B
• Closure property w.r.t addition C
• Additive identity D

The equation |x + 4| = x has solution

• x = -2 A
• x = 2 B
• x = -4 C
• x = 4 D

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

• 
  A
• 1 B
• -1 C
• 
  D

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

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

Every whole number is

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

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

The order axioms are satisfied by set of

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

√-1 b=

• b A
• 2 B
• 2b C
• None of these D

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

π is ______

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

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

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

If z₁ =√-36 ,z₂ =√-25,z3 =√-16 then

• 15 A
• 15i B
• -15i C
• -15 D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 D

• 
  A
• 
  B
• 
  C
• 
  D

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

The square roots of negative numbers is called

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

6 is

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

For any real numbers x,y,xy=o ⇒

• x ≠ 0 ∧ y ≠ 0 A
• x = 0 ∨ y = 0 B
• x = 0 C
• y = 0 D

In set builder notation the set {0,1,2,........100} can be written as

• {x / xε B ∧ x ≤ 100} A
• {x / x ∈ W ∧ x < 101} B
• {x / x ∈ Z ∧ x < 101} C
• The set of first 100 whole numbers D

A non-terminating non_recurring decimal represents an

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

∀x,y,z ∈ R and z 0,then

• x > y ⇒ xz > yz A
• x<y ⇒ xz < yz B
• x < y ⇒ xz > yz C
• None of these D

Any recurring decimal represents a

• Irrational no A
• Integer B
• Rational no C
• None of these D