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

When it's bad luck to meet a black cat?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Can you name some countries which do not have the alphabet 'A' in them?

How can a man go eight days without sleep?

You need to arrange three 7 and mathematical symbols to form number 1?

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

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

What kind of band never plays music?