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A scalar quantity has only magnitude but a vector quantity has both magnitude and direction. Out of the following, which is a vector quantity?

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Important Questions on Mathematical Methods

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Physics Crash Course NDA & NA EE>Chapter 1 - Mathematical Methods>Exercise 1>Q 2
If A→=ni^-j^+2k^ and B→=2i^+2j^-k^ and they are perpendicular to each other, then value of n is
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Physics Crash Course NDA & NA EE>Chapter 1 - Mathematical Methods>Exercise 1>Q 3
Which of the following is a scalar quantity?
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Physics Crash Course NDA & NA EE>Chapter 1 - Mathematical Methods>Exercise 1>Q 4
A particle is moving with speed 6 m s-1 along the direction of A→=2i^+2j^−k^. Then its velocity is
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Physics Crash Course NDA & NA EE>Chapter 1 - Mathematical Methods>Exercise 1>Q 5

In the cube of side 'a' shown in the figure, the vector from the central point of the face ABOD to the central point of the face BEFO will be : 

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Physics Crash Course NDA & NA EE>Chapter 1 - Mathematical Methods>Exercise 1>Q 6
A bus X is travelling with a speed of 40 km/h towards North. Another bus Y is travelling with a speed of 30 km/h towards East. The velocity of bus X with respect to the bus Y is
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Physics Crash Course NDA & NA EE>Chapter 1 - Mathematical Methods>Exercise 1>Q 7
The angle between two vectors x and y is θ. If the resultant vector z makes an angle θ2 with x, then which of the following is true?
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Physics Crash Course NDA & NA EE>Chapter 1 - Mathematical Methods>Exercise 1>Q 8
If A→ and B→ are two non-zero vectors such that, |A→+B→|=|A→−B→|2 and A→=2B→, then the angle between A→ and B→ is 
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Physics Crash Course NDA & NA EE>Chapter 1 - Mathematical Methods>Exercise 1>Q 9
Which of the following is a unit vector perpendicular to A→ and B→?