Question # 1

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

Choose an answer

(0.2, 0.4)

(-0.2, 0.4)

(0.2, -0.4)

(-0.2, -0.4)

Choose an answer

If 0 = R, thenthe additive inverse of a is

Choose an answer

1/9

^1/-9

a

-a

202.04 is an example of

Choose an answer

Recurring decimals

Non-recurring decimals

Terminating decimals

None of above

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

Choose an answer

associative property w.r.t addition

commutative property

Closure property w.r.t addition

Additive identity

Choose an answer

are real no

both are not real

are imaginary no

both are imaginary

Choose an answer

A rational number

A natural number

An irrational number

An integer

Choose an answer

0

1

-1

2

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

Choose an answer

Addition

Both a & c

Multiplication

None of these

4/√49 is a

Choose an answer

Irrational Number

Prime Number

Rational number

Whole number

Choose an answer

A positive integer

A negative integer

A natural number

An irrational number

∀x,y∈R and x> 0 , y>0, if x > y

Choose an answer

None of these

The value of x and y when (x + iy)2 = 5 - 4i

Choose an answer

x = 2, y = -1

x = -2, y = 1

x = 2, y = -i

x = 2, y = 2

1.4142135... is ______

Choose an answer

A natural number

A rational number

A prime number

An irrational number

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

Choose an answer

Commutative law of multiplication

Multiplicative identity

Associative law of multiplication

Multiplicative inverse

∀a,b, c ε R,a +c = b + c = > a = b

Choose an answer

Reflexive property

Symmetric property

Cancellations property w.r.t. addition

Transitive property

Choose an answer

-3 -2i

3 +2i

1 + 2i

1 - 2i

i² =

Choose an answer

1

2

-1

0

Choose an answer

1

-1

(a-1)-1 =

Choose an answer

a-1

a

-a

None of above

Every prime number is also

Choose an answer

Rational number

Even number

Irrational number

Multiple of two numbers

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

Choose an answer

2ⁿ

2ⁿ²

2.n

n²

Choose an answer

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

Choose an answer

If A = {x / x ∈ R ∧ x² - 16 = 0} then A =

Choose an answer

- x

Infinite set

Φ

{-4,4}

If z₁ =√-36 ,z₂ =√-25,z3 =√-16 then

Choose an answer

15

15i

-15i

-15

More Classes

Other Links

ECAT Pre General Science Mathematics Chapter 1 Number System Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer