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

What do you see in the given picture?

What is the next number in this matchsticks series riddle?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Solve the following series:
AZ, GT, MN, __, YB

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?