I have branches, but no fruit, trunk or leaves. What am I?

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 the Surname of Barbie Doll?

Buy me, smell me or deliver me, I do not change.

Who am I?

What does this mean?

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In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

How many times can you subtract the number 5 from 25?

Count the number of triangles in the picture below:

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?