Question # 1

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∀a,b,c∈R and c>0,then

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a>b ⇒ ac < bc

a>b ⇒ ac > bc

a<b ⇒ ac > bc

None of these

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N

r

2r

π

The√ is used for the

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Positive square root

Negative square root

+ve and -ve square root

Whole number

If z₁= 2 + 6i and z₂= 3 + 7i, then which expression defines the product of z₁and z₂?

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36 + (-32)i

-36 + 32i

6 + (-11)1

0, +(-12)i

14 is not a

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Prime number

Whole number

Even number

Real number

A prime number can be a factor of a square only if it occurs in the square at least

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Once

Thirce

Twice

None of these

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Closure law of addition

Associative law of addition

Additive inverse

Additive identity

Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8

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Associative property of addition

Associative property of multiplication

Additive identity

Multiplicative identity

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(x, y)

(kx, y)

(x, ky)

(kx, ky)

24 can be written as a product of

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Odd factors

Even factors

Whole factors

Prime factors

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Closure law of addition

Closure law of multiplication

Commutative law of addition

Commutative law of multiplication

In (x + iy) x is the known as

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Imaginary part of complex number

Real part of complex number

Complex number

None of above

Every recurring decimal represents

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A natural number

A rational number

An irrational number

A whole number

√25 is a number

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Rational

Irrational

Natural

Odd

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additive property

multiplicative property

additive identity

multiplicative identity

1/3 is ______

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A prime number

An integer

A rational number

An irrational number

i =

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√1

√2

√-2

√-1

202.04 is an example of

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Recurring decimals

Non-recurring decimals

Terminating decimals

None of above

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

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1

4

8

12

√23 is

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A rational number

A irrational number

An even integer

A factor of 36

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real number

complex number

rational number

irrational number

O is ______

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A positive integer

A negative integer

A natural number

An integer

The order axioms are satisfied by set of

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C

C and R

R

None of these

Additive inverse of - a - b is

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a

-a + b

a - b

a + b

The multiplicative inverse of (a,b) is

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

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√3 i

√7

-2-i

√5

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

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