Question # 1

If for the matrix A,A5 = 1,then A-1=

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A2

A3

A

None of above

Two unbiased dice are thrown. The probability that the total score is > 5 is

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1 / 18

7 / 18

13 / 18

11 / 18

If|a| =|b| = |a+b|=1, then|a-b| is equal to:

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1

√3

√2

7

For any two sets A and, A ⊆ B if

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x ∈ A ⇒ x ∈ B

x ∉ A ⇒ x ∉ B

x ∈ A ⇒ x ∉ B

None of these

1.4142135... is ______

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A natural number

A rational number

A prime number

An irrational number

Name the property used in 4.1 + (-4.1) = 0

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Additive inverse

Multiplication inverse

Additive identity

Multiplication identity

The set of all positive even integers is

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Not a group

A group w.r.t subtraction

A group w.r.t division

A group w.r.t multiplication

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The nth term of an A.P., is 12-4n. Its common difference is

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8

4

16

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Commutative law of multiplication

Closure law of multiplication

Associative law of multiplication

Multiplication identity

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