question_answer

Which of the following is the prime factorisation of 140?

A) \[\text{2  }\!\!\times\!\!\text{  2  }\!\!\times\!\!\text{  7}\]       

B) \[\text{2  }\!\!\times\!\!\text{  2  }\!\!\times\!\!\text{  5}\]

C) \[\text{2 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 5 }\!\!\times\!\!\text{ 7}\]               

D) \[\text{2 }\!\!\times\!\!\text{ 2 }\!\!\times\!\!\text{ 5 }\!\!\times\!\!\text{ 7 }\!\!\times\!\!\text{ 3}\]