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

Name the property used in 100 + 0 = 100

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

If a set S contains n elements then P (S) has ........ number of elements

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² D

0 (zero) is

• An irrational number A
• A rational number B
• A negative integer C
• A positive number D

∀ a ε R ∃ o ε R such that a + v = 0 + a = a is property of

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

• 1 A
• -i B
• i C
• 0 D

If Z = (1,2), then Z^-1= ?

• (0.2, 0.4) A
• (-0.2, 0.4) B
• (0.2, -0.4) C
• (-0.2, -0.4) D

202.04 is an example of

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

√25 is a number

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

The multiplicative inverse of 4 is

• -4 A
• -1/4 B
• 1/4 C
• 1 D

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

The set of natural no. is closed under

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

i³ =

• -1 A
• i B
• -i C
• 1 D

14 is not a

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

2.333....is a

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

• 
  A
• 
  B
• 
  C
• 
  D

If Z₁ = 1+ i, Z₂ = 2+3i , then |Z₁ -Z₂| =?

• √5 A
• √7 B
• -1-2i C
• √3 D

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

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

• A prime number A
• An integer B
• A whole number C
• An irrational number D

(a-1)-1 =

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

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

If z₁ = (a,b), z₂=(c,d), then z₁ z₂ = -------------------

• (ac,bd) A
• (ac+bd, ad-bc) B
• (ac-bd , ad+bc) C
• (ac-bd , ad-bc) D

Gooch crucible is made of :

• Brass. A
• Porcelain. B
• Bronze. C
• Gold. D

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

The square roots of negative numbers is called

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

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

Multiplicative inverse of "1" is

• 0 A
• ±1 B
• 1 C
• {0,1} D

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

The multiplicative inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 1 D