Explanation

For example, 22-carat gold will be marked as "22K" or "916," representing 91.6% purity.

The 916 hallmark gold price is often higher due to this guaranteed purity.

Explanation

 12 karat (12K) gold contains 50% gold.

The karat system measures gold purity,

Where 24 karat (24K) is considered 100% pure gold,

So 12 karat gold is 12/24, or half, pure gold. 

Explanation

VBA (Visual Basic for Applications) is used to produce macros.

VBA is a programming language owned by Microsoft and is integrated into most Microsoft Office applications

Explanation

Empty out means to clear something inside.

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Explanation

-9×-9=81

So B is correct

Explanation

1 Gunta = 101.171 square meters (standard land measurement)  

Explanation

 The moment of inertia of a solid sphere is (2/5)MR^2, where M is the mass and R is the radius.

This formula applies when the axis of rotation passes through the center of the sphere. 

Explanation

 A century can only start with a Monday, Wednesday, Friday or Saturday,

so it will end on Sunday, Tuesday, Thursday or Friday.

So the only day which can both start or end a century is FRIDAY.

There are two types of centuries - one that ends with a leap year and one that does not.

Explanation

Shah Irfan Ahmed Gharsheen is the current chairman of Gwadar Port Authority.

He was appointed after the approval of PM Shahbaz Sharif.

He was appointed for the period of two years in June 2025.

Explanation

The SI unit of velocity is a ms^-1 and m/s.