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NAT I General Science Mathematics MCQs With Answers

Question # 1

If the vector 2i+4j-2k and 2i +6j+xk are perpendicular then x-7

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Question # 2

Sin^-1 (-x) =

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Cos^-1 1/x

-Sin^-1 X

1/sin-1x

Sin^-1 1/x

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Question # 3

The total cost of 2 apples and 3 oranges is $1.70,which of the following is true

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The cost of one apple

The cost of one orange

Both have equal cost per item

Cost of each single item can not be determined

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Question # 4

If α and β be irrational roots of a quadratic equation, then

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α = b/a and β = ca

α = a/b and β = -c/a

α² + β² = 1

α = -b/a and β= c/a

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Question # 5

There are 30 Red balls and 25 Green balls in a bag of a ball is drawn from the bag randomly what is the probability that a Blue ball comes out?

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0.5

None

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Question # 6

Cos 315° =

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0.707

0.5

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Question # 7

Two dice are rolled The number of possible out come in which at least one die shows 2 is?

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Question # 8

π/3 is

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A positive integer

A negative integer

A natural number

An irrational number

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Question # 9

The two consecutive positive integers whose product is 56 are

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7, 8

14, 4

28, 2

56, 1

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Question # 10

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

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√3 I

√7

-2-1

√5

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Question # 11

If Z₁ = √-36, Z₂=√-25, Z₃= √-16, then what is the sum of Z₁, Z₂ and Z₃ ?

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√3 I

√7

-2-1

√5

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