What is the next number in the series?

15 29 56 108 208 ?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

I cannot talk, but I always reply when spoken to. What am I?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Can you replace the question mark with the correct number?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

What is harder to catch the faster you run?

How many words can a quill made with the feather of a pigeon write with a 100ml bottle of black ink?