The intersection of any two disjoint sets is a null set. Justify your answer.

Is silver is mineral or Ore? Justify your answer.

State whether each of the following statement is true or false. Justify your answers. {a,e,I,o,u} and {a,b,c,d} are disjoint sets.

State whether each of the following statement is true or false. Justify your answers. {2,3,4,5} and {3,6} and disjoint sets.

State whether each of the following statement is true or false. Justify your answers. {2,6,10} and {3,7,11} are disjoint sets.

State whether each of the following statement is true or false. Justify your answers. {2,6,10,14} and {3,7,11,15} are disjoint sets.

State whether the following statements are true or false. Justify your answer. 5 notin set of prime numbers

State whether the following statements are true or false. Justify your answer. -5 notin W where 'W' is the set of whole numbers.

Is log_3 81 rational or irrational ? Justify your answer.

Is a square similar to a rectangle? Justify your answer.

Is it right to say that sin (A + B) = sin A + sin B? Justify your answer.