Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

What kind of storm is always in a rush?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

I’m tall when I’m young, and I’m short when I’m old. What am I?

How can a man go eight days without sleep?