ECAT Pre General Science MCQ Test With Answer for Mathematics Chapter 1

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

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

The equation |x +4| = x has solution

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

• 
  A
• 
  B
• 
  C
• None of these D

Name the property used in 4.1 + (-4.1) = 0

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

• 1 A
• -i B
• i C
• 0 D

• Reflexive property A
• Symmetric property B
• Transitive property C
• Additive property D

• 
  A
• 
  B
• 
  C
• 
  D

The set of natural no. is closed under

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

∀a,b, c ε R ac = bc ⇒ a = b, c ≠ 0 is a

• Symmetric property A
• Cancellation property w.r.t multiplication B
• Reflexive property C
• Transitive property 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 = -1 C
• X = 2, y = 2 D

i³ =

• -1 A
• i B
• -i C
• 1 D

If 0 = R, thenthe additive inverse of a is

• 1/9 A
• ^1/-9 B
• a C
• -a D

• additive property A
• multiplicative property B
• additive identity C
• multiplicative identity D

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

The real number system contains.

• Positive Numbers A
• Negative numbers B
• Zero C
• (option a, b and c) D

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

• One A
• Two B
• Three C
• Four D

√2 is a number

• Rational A
• Irrational B
• Even C
• Odd D

• Principle of equality of Fractions A
• Rule for product of fraction B
• Golden rule of fraction C
• Rule of quotient of Fraction D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

a >b, b >c ⇒a >c is a

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

• 15 A
• 15 i B
• -15 i C
• -15 D

Every whole number is

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

• Reflexive property A
• Symmetric property B
• Cancellations property w.r.t. addition C
• Transitive property D

Any recurring decimal represents a

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

The equation |x + 4| = x has solution

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

• Additive property in R A
• Multiplication property in R B
• Cancellation property in R C
• Distribution property in R D

I is not

• Real number A
• Natural number B
• Prime Number C
• Whole Number D

• 
  A
• 
  B
• 
  C
• 
  D

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