On a shelf are placed six volumes side-by-side labelled $A, B, C, D, E$ and $F$. $B, C, E, F$ have green covers while others have yellow covers. $A, D, B$ are new volumes while the rest are old volumes. $A, C, B$ are law reports while the rest are medical extracts. Which two volumes are old medical extracts and have green covers?

Ravi is not wearing white and Ajay is not wearing blue. Ravi and Sohan wear different colours. Sachin alone wears red. What is Sohan's colour,if all four of them are wearing different colours?

How many days of gap are there between Science and Philosophy?

In a school,there were five teachers. $A$ and $B$ were teaching Hindi and English. $C$ and $B$ were teaching English and Geography. $D$ and $A$ were teaching Mathematics and Hindi. $E$ and $B$ were teaching History and French. $D, B$ and $A$ were teaching which of the following subjects?

$(i)$ Jayant,Kamal,Namita,Asha,and Tanmay are five members of a family.
$(ii)$ Their birth dates are from January to May,with each member born in one of these months.
$(iii)$ Each one likes one particular item for his/her birthday out of Bengali Sweets,Chocolates,Pastries,Ice Cream,and Dry Fruits.
$(iv)$ The one who likes Pastries is born in the month which is exactly middle in the months given.
$(v)$ Asha does not like Ice cream but brings Chocolates for Jayant in February.
$(vi)$ Tanmay,who is fond of Bengali sweets,is born in the month immediately after Namita.
$(vii)$ Namita does not like Dry fruits or Ice cream.
What is the choice of Asha?

$(i)$ Seven books are placed one above the other in a particular way.
$(ii)$ History book is placed exactly above Civics book.
$(iii)$ Geography book is fourth from the bottom and English book is fifth from the top.
$(iv)$ There are two books in between Civics and Economics books.
How many books are there between Civics and Science books? To answer this question,which other extra information is required,if any,from the following?