Questions

A tennis ball or badminton shuttle in which we can serve a ball or kock but we cannot eat it.

The man has 12 sons and the 12 sons has each one sister.

=> 12 sons + 1 sister = 13 children.

Monaco, the world's second smallest country after Vatican City, has the smallest written constitution in the world. 

It comprises of 10 chapters with 97 Articles and a total of 3,814 words.

India has the world's largest written constitution.

The common greenhouse gas containing only hydrogen and oxygen is H2O, this is water vapor.

The common greenhouse gases are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.

The composition (chemical formula) of those gases are:

Water vapor: H2O
Carbon dioxide: CO2
Methane: CH4
Nitrous oxide: NO
Ozone: O3.

As you see the only one of those that contains only hydrogen and oxygen is H2O, water vapor.

An M.S Excel Workbook is a collection of both Worksheets and Charts.

let sum =x . s.i.=x

rate =(100*x)/(x*6)=50/3%

now ,sum =x, s.i= 3x, rate =50/3%

time =(100*3x)/(x*50/3) = 18 years