Here is a mathematical expression that also secretly tells a movie name. What movie is that?

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes