What kind of storm is always in a rush?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

What is black when you buy it, red when you use it, and gray when you throw it away?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

Decode below rebus
D
N
A
T
S , D

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

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

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?