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

√23 is

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

Every whole number is

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

The equation |x +4| = x has solution

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

14 is not a

• Prime number A
• Whole number B
• Even number C
• Real number D

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

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

• One A
• Two B
• Three C
• Four D

Name the property used in 1000 x 1 = 1000

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

• 
  A
• 
  B
• 
  C
• None of these D

The property used in -3 <-2 ⇒0 <1

• Commutative property A
• Additive property of inequality B
• Additive inverse C
• Additive identity D

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

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

• 
  A
• 
  B
• 
  C
• 
  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

If in a set of real no a is multiplicative identity then

• a,a = a² A
• a,a = 1 B
• a,a = 0 C
• None of these D

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

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

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 D

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

∀a,b, c ε R,a +c = b + c = > a = b

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

• Commutative property of addition A
• Closure property of addition B
• Additive inverse C
• Associative property w.r.t. to addition D

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

√25 is a number

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

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

Total number of subsets that can be formed out of the set {a,b,c} is

• 1 A
• 4 B
• 8 C
• 12 D

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

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

• 
  A
• 
  B
• 
  C
• 
  D

• 15 A
• 15 i B
• -15 i C
• -15 D

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

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