A is D's brother. D is the son of Mrs. C. B is Mrs. C's father. How is A related to B?
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The name of our planet Earth originates from which language?
To hear a distinct echo the time interval between the original sound and the reflected sound must be at least
Select the odd letters from the given alternatives.
The property of metals by which they can be beaten into thin sheets is called _______________.
The land forms formed by wave erosion is
If sin -330° = x, then the value of x is
A tetrahedron has 4 vertices. How many edges does it have?