Odd days and counting of odd days

How many odd days are there in 527 days ?

Imagine that in a calendar year, there were 998 days and 12 days in a week, then no.of odd days in that year will be

The present red blood cells (RBC) count of a person is 54000 and it increases at a rate of 5% per day. What would be the RBC count after two days ?

Prove that the product of two even or two odd functions is an even function, whereas the product of an even and an odd function is an odd function.

There are as many notes as number of oxygen atoms in 24.8 gm Na_(2)S_(2)O_(3).5H_(2)O (Mw = 248). A note counting machine counts 48 milion notes per day. Number of days taken to count these notes is

Which of the following is always odd? a) sum of two odd numbers b) Difference of two odd numbers c) Product of two odd numbers d) None of these

A is counting the numbers from 1 to 31 and B from 31 to 1.A is counting the odd numbers only.The speed of both is the same.What will be the number which will be pronounced by A and B together?

Prove that the derivative of an even function is an odd function and that of an odd function is an even function.