what's the probability of getting a king or a queen from a pack of 52 cards?

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

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

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.

Check out the number list below and find what number comes next in the sequence.

111 , 113 , 117 , 119 , 123 , 137 , ?

Which wheel of car does not rotate when you turn your car right?

What can you deduce from the following BrainBat?

CRY
LMKI

Solve below rebus puzzle?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Count the number of balls in picture below: