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

why number 8549176320 is one of a kind?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

There is a place where if I stand up straight, I will still be considered sideways.