ECAT Pre General Science Chapter 1 MCQ Test With Answer for Mathematics chapter 1 (Number System)

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

24 can be written as a product of

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

(a^-1)^-1=

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

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

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

i² = 

• 1 A
• 2 B
• -1 C
• 0 D

Any whole number can be written as a product of factors which are

• Odd numbers A
• Prime number B
• Rational number C
• Even number D

• 15 A
• 15 i B
• -15 i C
• -15 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

i² =

• 1 A
• 2 B
• -1 C
• 0 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

• 
  A
• 
  B
• 
  C
• 
  D

Every real number is

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

∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is

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

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

(a +bi) -c (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

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

1/3 is a decimal

• Recurring A
• Terminating B
• Non-terminating C
• None of the above D

The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 D

2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called

• Associative property A
• Identity property B
• Commutative property C
• Closure property w.r.t multiplication D

• 
  A
• 
  B
• 
  C
• 
  D

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

Such fraction which can not be written in the form ofp⁄q where p,q and q≠ 0,such fractions are called.

• Fractinal numbers A
• Rational Numbers B
• Even Numbers C
• Whole Numbers D

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

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

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

• One A
• Two B
• Three C
• Four D

202.04 is an example of

• Recurring decimals A
• Non-recurring decimals B
• Terminating decimals C
• None of these D

Every irrational number is

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

6 is

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

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