What is the next shape from answers A, B, C, and D figure?

There is a bag which have 21 blue balls and 23 red balls. You also have 22 red balls outside the bag. Randomly remove two balls from the bag. * If they are of different colors, put the blue one back in the bag. * If they are the same colour, take them out and put a red ball back in the bag. Repeat this until only one ball remains in the bag. What is the color of the sole ball left in the bag ?

There is something which is always coming but never arrives?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

If eleven plus two equals one, what does nine plus five equal?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

What kind of band never plays music?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

I shave every day, but my beard stays the same. What am I?

Name a key which is hardest to turn.