English vs physics war

What is the difference between the total number of teachers who teach English and Physics together and the total number of teachers who teach Mathematics and Biology together?

Seven books Math,English,Physics, Chemistry , Biology, Hindi, Histroy are arranged one above another. Only two books are placed above chemistry book. Only two book is placed between history and Biology as between box biology and math. Three boxes are placed between box English and physics. English is placed above physics. Which of the following is true regarding English book ?

Seven books Math,English,Physics, Chemistry , Biology, Hindi, Histroy are arranged one above another. Only two books are placed above chemistry book. Only one book is placed between history and Biology as between box biology and math. Three boxes are placed between box English and physics. English is placed above physics. How many total numbers of books are placed in between book history and biology ?

Seven books Math,English,Physics, Chemistry , Biology, Hindi, Histroy are arranged one above another. Only two books are placed above chemistry book. Only two book is placed between history and Biology as between box biology and math. Three boxes are placed between box English and physics. English is placed above physics. Which book is placed at top ?

Seven books Math,English,Physics, Chemistry , Biology, Hindi, Histroy are arranged one above another. Only two books are placed above chemistry book. Only two book is placed between history and Biology as between box biology and math. Three boxes are placed between box English and physics. English is placed above physics. Which book is placed immediately above biology ?

Seven books Math,English,Physics, Chemistry , Biology, Hindi, Histroy are arranged one above another. Only two books are placed above chemistry book. Only two book is placed between history and Biology as between box biology and math. Three boxes are placed between box English and physics. English is placed above physics. Which book is placed immediately above biology ?

Physical And Chemical Changes|Physical Changes Examples|Chemical Changes|Chemical Changes Vs Physical Changes

Physical And Chemical Changes|Physical Changes Examples|Chemical Changes|Chemical Changes Vs Physical Changes

Dev obtained 76, 65, 82, 67 and 85 marks (out in 100) in English, Mathematics, Physics, Chemistry and Biology. What are his average marks?

Physical And Chemical Changes|Physical Changes|Chemical Changes|Chemical Changes Vs Physical Changes|Suspension|Colloids|Colloids Solution Or Colloidal Sol|Difference|Types Of Colloidal Solutions|Tyndall Effect