Question 918002
<pre>
Let's list the primes up to the first two-digit one.

A prime is a positive integer other than 1 that has as its only factors
itself and 1.

The first 5 primes are

2,3,5,7,11, and as we see, 11 is the smallest 2-digit prime.
</pre>
To find my number take 1 fewer than the square of the smallest two digit prime number 
<pre>
The smallest two-digit prime is 11
It's square is 121
1 fewer that 121 is 120

and divide this result 

That is we are to divide 120 ...
</pre>
by the difference between the squares of the fourth and first prime numbers.
<pre>
The 4th and 1st prime numbers are 7 and 2.
Their squares are 49 and 4.
The difference between them is 49-4= 45

So we are to divide 120 by 45:

{{{120/45=8/3}}}
</pre>
What is my number?
<pre>
{{{8/3}}}

Edwin</pre>