a) Number of months in a year = int as it can’t be string or float
b) Resident of Delhi or not = boolean as it is a condition like ‘either or’
c) Mobile number = int as it can’t be float or string
d) Pocket money = float as it can be a decimal value i.e. 10.50
e) Volume of a sphere = float as volume of sphere = 4/3( * r3), value of = 3.14 and r value can be decimal i.e. 4.5 unit
f) Perimeter of a square = float as perimeter = 4 * length of side, the length of side can be a decimal value
g) Name of the student = string as name is combinations of characters
h) Address of the student = string as address is the concatenated form of different strings.