If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

10+10 and 11+11 can give you the same answer.

Explain how?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What is the next number?

77, 49, 36, 18 ?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

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.

Solve the rebus riddle in the picture below.

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

What can you serve, but never eat?

I am quite hot but become too cold if you remove the first two letters. What am I?