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+Task 1: "Trailing Zeroes
+
+You are given a positive integer $N (<= 10).
+
+Write a script to print number of trailing zeroes in $N!.
+
+Example 1
+Input: $N = 10
+Output: 2 as $N! = 3628800 has 2 trailing zeroes
+
+Example 2
+Input: $N = 7
+Output: 1 as $N! = 5040 has 1 trailing zero
+
+Example 3
+Input: $N = 4
+Output: 0 as $N! = 24 has 0 trailing zero
+
+"
+
+My notes: ok.  Very easy.  fact and "while mod 10 == 0 inc & div 10"
+See also ch-1a.pl, which TABULATES n, n! and trailing-zeroes(n!)..
+
+Task 2: "Lines Range
+
+You are given a text file name $file and range $A - $B where $A <= $B.
+
+Write a script to display lines range $A and $B in the given file.
+Example
+Input:
+
+    $ cat input.txt
+    L1
+    L2
+    L3
+    L4
+    ...
+    ...
+    ...
+    ...
+    L100
+
+$A = 4 and $B = 12
+
+Output:
+
+    L4
+    L5
+    L6
+    L7
+    L8
+    L9
+    L10
+    L11
+    L12
+"
+
+My notes: ok.  Seems even easier.  I/O and a line number count (let's use $.)